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Encyclopedia > 1000 (number)

List of numbersIntegers This is a list of articles about numbers (not about numerals). ... The integers are commonly denoted by the above symbol. ...

1k 2k 3k 4k 5k 6k 7k 8k 9k Nine hundred is the natural number following eight hundred ninety-nine and preceding nine hundred one. ... 2000 (two thousand) is the natural number following 1999 and preceding 2001. ... Three thousand (3000) is the natural number following 2999 and preceding 3001. ... Four thousand (4000) is the natural number following 3999 and preceding 4001. ... Five thousand (5000) is the natural number following 4999 and preceding 5001. ... Six thousand (6000) is the natural number following 5999 and preceding 6001. ... 7000 is the natural number following 6999 and preceding 7001. ... 8000 (eight thousand) is the natural number following 7999 and preceding 8001. ... 9000 (nine thousand) is the natural number following 8999 and preceding 9001. ... Look up ten thousand in Wiktionary, the free dictionary. ...

Cardinal 1000
one thousand
Ordinal 1000th
one thousandth
Factorization 2^3 cdot 5^3
Divisors 2, 4, 5, 10,
20, 25, 50
Roman numeral M
Roman numeral (Unicode) M, m
prefixes Wiktionary:chilia (from Greek)

Wiktionary:milli- (from Latin) Aleph-0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are a generalized kind of number used to denote the size of a set. ... Commonly, ordinal numbers, or ordinals for short, are numbers used to denote the position in an ordered sequence: first, second, third, fourth, etc. ... In mathematics, factorization or factoring is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or factors, which when multiplied together give the original. ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... A numerical prefix is a prefix that denotes a number, which is usually a multiplier for the thing being prefixed. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ...

Binary 1111101000
Octal 1750
Duodecimal 6B4
Hexadecimal 3E8
Look up one thousand in
Wiktionary, the free dictionary.

1000 (one thousand) is the natural number following 999 and preceding 1001. The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7. ... The duodecimal (also known as base-12 or dozenal) system is a numeral system using twelve as its base. ... In mathematics and computer science, hexadecimal, base-16, or simply hex, is a numeral system with a radix, or base, of 16, usually written using the symbols 0–9 and A–F, or a–f. ... Wikipedia does not have an article with this exact name. ... Wiktionary (from wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ... In mathematics, a natural number can mean either an element of the set {1, 2, 3, ...} (i. ... Nine hundred ninety-nine is the natural number following nine hundred ninety-eight and preceding one thousand. ... 1001 is the natural number preceding 1002 and following 1000. ...

Contents

In mathematics

  • The decimal representation for one thousand is
  • The SI prefix for a thousand is kilo-, officially abbreviated as k — for instance prefixed to metre or its abbreviation m, kilometre or km signifies a thousand metres ;
    • as such technically oriented people occasionally represent the number in a non-standard notation by replacing the last three zeroes of the general numeral with "k", for instance 30 k for 30,000
  • The sum of Euler's totient function over the first 57 integers is 1000.

Look up one in Wiktionary, the free dictionary. ... 0 (zero) is both a number and a numerical digit used to represent that number in numerals. ... Engineering notation is scientific notation in which the powers of ten are limited to those where the exponent is a multiple of three, i. ... Scientific notation is a (very helpfull) notation for writing numbers that is often used by scientists and mathematicians to make it easier to write large and small numbers. ... Scientific notation is a (very helpfull) notation for writing numbers that is often used by scientists and mathematicians to make it easier to write large and small numbers. ... Look up si, Si, SI in Wiktionary, the free dictionary. ... An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol) to form a decimal multiple or submultiple. ... Kilo (symbol: k) is a prefix in the SI system denoting 103 or 1000. ... The metre (or meter, see spelling differences) is a measure of length. ... A number is an abstract entity that represents a count or measurement. ... A numeral is a symbol or group of symbols that represents a number. ... The first thousand values of φ(n) In number theory, the totient (n) of a positive integer n is defined to be the number of positive integers less than or equal to n and coprime to n. ...

In time

A millennium (pl. ... Europe in 1000 The year 1000 of the Gregorian Calendar was the last year of the 10th century as well as the last year of the first millennium. ... Dionysius Exiguus invented Anno Domini years to date Easter. ...

In popular culture

For information on the number 1000, see 1000 (number). ... 1993 (MCMXCIII) was a common year starting on Friday of the Gregorian calendar and marked the Beginning of the International Decade to Combat Racism and Racial Discrimination (1993-2003). ... Techno is a form of electronic dance music that became prominent in Detroit, Michigan (some argue that it may have been born in Europe) during the mid-1980s with influences from Chicago House, electro, New Wave, Funk and futuristic fiction themes that were prevalent and relative to modern culture during... Moby (born Richard Melville Hall on September 11, 1965, in Harlem, New York, and raised in Darien, Connecticut) is an American songwriter, musician and singer. ... Slang is the use of highly informal words and expressions that are not considered standard in the speakers dialect or language. ... For other uses, see United States (disambiguation) and US (disambiguation). ... The term gambling has had many different meanings depending on the cultural and historical context in which it is used. ... Dime is a term with multiple slang meanings. ...

Trivia

To count to one thousand, counting one number every second continuously would take 16 minutes and 40 seconds. Look up second in Wiktionary, the free dictionary. ... A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ... Look up second in Wiktionary, the free dictionary. ...




Selected numbers in the thousands (1001-1999)

1001-1249

1001 - sphenic number (7 x 11 x 13), pentagonal number, pentatope number
1002 - sphenic number, Mertens function zero, abundant number
1003 - semiprime (17 × 59)
1005 - Mertens function zero
1008 - divisible by the number of primes below it
1009 - first prime above 1000
1010 - Mertens function zero
1013 - Sophie Germain prime, centered square number, Mertens function zero
1014 - Mertens function zero
1015 - square pyramidal number
1016 - member of the Mian-Chowla sequence
1018 - Mertens function zero
1019 - Sophie Germain prime, safe prime
1020 - polydivisible number
1023 - is the highest number one can count to on one's fingers using binary
1024 - 210, the amount of bytes in a kilobyte (in 1999, the IEC coined kibibyte to use for 1024 with kilobyte being 1000, but this convention has not been widely adopted)
1027 - sum of the squares of the first eight primes
1028 - sum of totient function for first 58 integers
1031 - Sophie Germain prime
1035 - triangular number, hexagonal number
1049 - Sophie Germain prime, highly cototient number
1051 - centered pentagonal number
1056 - pronic number
1060 - sum of the first 25 primes
1071 - heptagonal number
1072 - centered heptagonal number
1079 - every positive integer is the sum of at most 1079 tenth powers.
1080 - pentagonal number
1081 - triangular number, member of Padovan sequence
1086 - Smith number, sum of totient function for first 59 integers
1087 - Chen prime, cousin prime, lucky prime, Kynea number
1089 - 332, nonagonal number, centered octagonal number
1091 - cousin prime and twin prime
1092- divisible by the number of primes below it
1093 - twin prime and star number
1102 - sum of totient function for first 60 integers
1103 - Sophie Germain prime, balanced prime
1104 - Keith number
1105 - Carmichael number, magic constant of n × n normal magic square and n-Queens Problem for n = 13, decagonal number, centered square number, 1105 = 332 + 42 = 322 + 92 = 312 + 122 = 232 + 242
1116 - divisible by the number of primes below it
1122 - pronic number, divisible by the number of primes below it
1123 - balanced prime
1124 - Leyland number
1128 - triangular number, hexagonal number, divisible by the number of primes below it
1134- divisible by the number of primes below it
1138 - recurring number in the works of George Lucas and his companies, beginning with his first feature film - THX 1138; particularly, a special code for Easter eggs on Star Wars DVDs.
1140 - tetrahedral number
1152 - highly totient number
1156 - 342, octahedral number, centered pentagonal number
1159 - member of the Mian-Chowla sequence
1161 - sum of the first 26 primes
1162 - pentagonal number, sum of totient function for first 61 integers
1169 - highly cototient number
1170 - highest possible score in an NAQT match
1176 - triangular number
1177 - heptagonal number
1184 - amicable number with 1210
1187 - safe prime, Stern prime, balanced prime
1190 - pronic number
1192 - sum of totient function for first 62 integers
1198 - centered heptagonal number
1200 - the number of households the Nielsen ratings sample
1201 - centered square number
1210 - amicable number with 1184
1216 - nonagonal number
1219 - Mertens function zero
1220 - Mertens function zero
1223 - Sophie Germain prime, balanced prime
1225 - 352, triangular number, triangular square number, hexagonal number, centered octagonal number
1228 - sum of totient function for first 63 integers
1229 - Sophie Germain prime
1233 - 122 + 332
1240 - square pyramidal number
1241 - centered cube number
1242 - decagonal number
1247 - pentagonal number

1001 is the natural number preceding 1002 and following 1000. ... A sphenic number is a positive integer that is the product of three distinct prime factors. ... A pentagonal number is a figurate number that represents a pentagon. ... A pentatope number is a number in the fifth cell of any row of Pascals triangle starting with the 5-term row 1 4 6 4 1 either from left to right or from right to left. ... In number theory, the Mertens function is where &#956;(k) is the Möbius function. ... In mathematics, an abundant number or excessive number is a number n for which σ(n) > 2n. ... In mathematics, a semiprime (also called biprime or 2-almost prime, or pq number) is a natural number that is the product of two (not necessarily distinct) prime numbers. ... In mathematics, a prime number (or a prime) is a positive integer that has exactly two (distinct) natural number divisors, which are 1 and the prime number itself. ... A prime number p is called a Sophie Germain prime if 2p + 1 is also prime. ... A centered square number is a centered figurate number that represents a square with a dot in the center and all other dots surrounding the center up to a certain city block distance, i. ... A pyramidal number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides. ... In mathematics, the Mian-Chowla sequence is a integer sequence with and recursively, for being the smallest integer such that each pairwise sum is distinct from the others, where and likewise for . ... A safe prime is a prime number of the form 2p + 1, where p is also a prime. ... In mathematics a polydivisible number is a number with digits that has the following properties :- Its first digit a is not 0. ... 1024 is the natural number following 1023 and preceding 1025. ... This article refers to the unit of binary information. ... A kilobyte (derived from the SI prefix kilo-, meaning 1000) is a unit of information or computer storage equal to the decimal 1024 bytes (2 to the 10th power, or 1,024 bytes based in the binary system). ... A triangular number is a natural number such that the shape of an equilateral triangle can be formed by that number of points. ... A hexagonal number is a figurate number that represents a hexagon. ... In number theory, a branch of mathematics, a highly cototient number k is an integer that has more solutions to the equation x - &#966;(x) = k, where &#966; is Eulers totient function, than any integer below it, with the exception of 1. ... A centered pentagonal number is a centered figurate number that represents a pentagon with a dot in the center and all other dots surrounding the center in successive pentagonal layers. ... A pronic number, or oblong number or heteromecic number, is a number which is the product of two consecutive nonnegative integers, that is, n(n + 1). ... A heptagonal number is a figurate number that represents a heptagon. ... A centered heptagonal number is a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center dot in successive heptagonal layers. ... The Padovan sequence is the sequence of integers P(n) defined by the initial values and the recurrence relation The first few values of P(n) are 1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12, 16, 21, 28, 37, 49, 65, 86, 144, 151, 200. ... A Smith number is a number which in a given base, the sum of its digits is equal to the sum of the digits in its factorization. ... A prime number p is called a Chen prime if p + 2 is either a prime or a product of two primes. ... In mathematics, a cousin prime is a pair of prime numbers that differ by four; compare this with twin primes, pairs of prime numbers that differ by two, and sexy primes, pairs of prime numbers that differ by six. ... Headline text A lucky prime is a number that is a prime number and a lucky number. ... A Kynéa number (pronounced: Ka-Nay), named after Kynéa R. Griffith, is an integer of the form . ... 1089 is the number after 1088 and before 1090. ... A nonagonal number or enneagonal number is a figurate number that represents a nonagon. ... A centered octagonal number is a centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center dot in successive octagonal layers. ... In mathematics, a cousin prime is a pair of prime numbers that differ by four; compare this with twin primes, pairs of prime numbers that differ by two, and sexy primes, pairs of prime numbers that differ by six. ... A twin prime is a prime number that differs from another prime number by two. ... A twin prime is a prime number that differs from another prime number by two. ... A star number, or centered 12-gonal number, is a centered figurate number that represents a centered hexagram, such as the one that Chinese checkers are played on. ... A balanced prime is a prime number that is equal to the arithmetic mean of the nearest prime above and below. ... In mathematics, a Keith number or repfigit number is an integer that appears as a term in a linear recurrence relation with initial terms based off its own digits. ... In number theory, a Carmichael number is a composite positive integer n which satisfies the congruence bn âˆ’ 1 ≡ 1 (mod n) for all integers b which are relatively prime to n (see modular arithmetic). ... The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... It has been suggested that Date magic square be merged into this article or section. ... One possible solution The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ... A decagonal number is a figurate number that represents a decagon. ... A Leyland number is an integer of the form xy + yx with 1 < x ≤ y. ... 1138 is the natural number following 1137 and preceding 1139. ... George Walton Lucas, Jr. ... THX 1138 was George Lucas first full length movie. ... Opening logo to the Star Wars films Star Wars is an epic science fantasy saga and fictional universe that was created by writer/producer/director George Lucas during the late 1970s. ... A pyramid with side length 5 contains 35 spheres. ... A highly totient number k is an integer that has more solutions to the equation &#966;(x) = k, where &#966; is Eulers totient function, than any integer below it. ... An octahedral number is a figurate number that represents an octahedron, or two pyramids placed together, one upside-down underneath the other. ... National Academic Quiz Tournaments (LLC) is a question-writing and quizbowl organizing company founded by former players in 1996. ... Amicable numbers are two numbers so related that the sum of the proper divisors of the one is equal to the other, unity being considered as a proper divisor but not the number itself. ... A Stern prime is a prime number that is not the sum of a smaller prime and twice the square of a nonzero integer. ... When TV viewers or entertainment professionals in the United States mention ratings they are often referring to Nielsen Ratings, a system developed by Nielsen Media Research to determine the audience size and composition of television programming. ... A triangular square number is a number which is both a triangular number and a perfect square. ... A centered cube number is a centered figurate number that represents a cube. ...

1250-1499

1255 - Mertens function zero
1256 - Mertens function zero
1258 - Mertens function zero
1259 - highly cototient number
1260 - highly composite number, pronic number, vampire number, sum of totient function for first 64 integers
1261 - star number, Mertens function zero
1264 - sum of the first 27 primes
1266 - centered pentagonal number, Mertens function zero
1270 - Mertens function zero
1279 - Mertens function zero
1280 - Mertens function zero
1282 - Mertens function zero
1283 - safe prime
1285 - Mertens function zero
1288 - heptagonal number
1289 - Sophie Germain prime, Mertens function zero
1291 - Mertens function zero
1292 - Mertens function zero
1296 - 64, 362, sum of the cubes of the first eight positive integers, the number of rectangles on a normal 8x8 chessboard
1297 - Mertens function zero
1299 - Mertens function zero
1300 - Mertens function zero, largest possible win margin in an NAQT match
1301 - centered square number
1302 - Mertens function zero
1306 - Mertens function zero
1307 - safe prime
1312 - member of the Mian-Chowla sequence
1308 - sum of totient function for first 65 integers
1318 - Mertens function zero
1319 - safe prime
1325 - Markov number
1326 - triangular number, hexagonal number, Mertens function zero
1328 - sum of totient function for first 66 integers
1329 - Mertens function zero
1330 - tetrahedral number, forms a Ruth-Aaron pair with 1331 under second definition
1331 - 113, centered heptagonal number, forms a Ruth-Aaron pair with 1330 under second definition
1332 - pronic number
1335 - pentagonal number, Mertens function zero
1336 - Mertens function zero
1337 - Used in the novel form of spelling called leet
1338 - Mertens function zero
1342 - Mertens function zero
1350 - nonagonal number
1365 - pentatope number
1367 - safe prime, balanced prime
1369 - 372, centered octagonal number
1371 - sum of the first 28 primes
1378 - triangular number
1379 - magic constant of n × n normal magic square and n-Queens Problem for n = 14.
1381 - centered pentagonal number
1387 - super-Poulet number, decagonal number
1394 - sum of totient function for first 67 integers
1395 - vampire number, member of the Mian-Chowla sequence
1404 - heptagonal number
1405 - 262 + 272, 7^2 + 8^2 + cdots + 16^2, centered square number
1406 - pronic number, semi-meandric number
1409 - Sophie Germain prime
1419 - Zeisel number
1425 - self-descriptive number in base 5
1426 - sum of totient function for first 68 integers
1426 - pentagonal number
1430 - Catalan number
1431 - triangular number, hexagonal number
1432 - member of Padovan sequence
1435 - vampire number; the standard railway gauge in millimetres, equivalent to 4' 8½"
1439 - Sophie Germain prime, safe prime
1440 - a highly totient number and a 481-gonal number. Also, the number of minutes in one day, and the blocksize of a standard 3,5" floppy disk
1441 - star number
1444 - 382, smallest pandigital number in Roman numerals
1451 - Sophie Germain prime
1469 - octahedral number, highly cototient number
1470 - pentagonal pyramidal number, sum of totient function for first 69 integers
1471 - centered heptagonal number
1480 - sum of the first 29 primes
1481 - Sophie Germain prime
1482 - pronic number
1485 - triangular number
1487 - safe prime
1490 - tetranacci number
1491 - nonagonal number, Mertens function zero
1492 - Mertens function zero
1493 - Stern prime
1494 - sum of totient function for first 70 integers
1496 - square pyramidal number
1499 - Sophie Germain prime

A highly composite number is a positive integer which has more divisors than any positive integer below it. ... A vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains all the digits from x and... In geometry, a rectangle is a defined as a quadrilateral polygon in which all four angles are right angles. ... Chessboard Chessboard with Staunton chess pieces A chessboard is often painted or engraved on a chess table. ... National Academic Quiz Tournaments (LLC) is a question-writing and quizbowl organizing company founded by former players in 1996. ... A Markov number or Markoff number is an integer x, y or z that is part of a solution to the Markov Diophantine equation The first few Markov numbers are 1, 2, 5, 13, 29, 34, 89, 169, 194, 233, 433, 610, 985, 1325, ... (sequence A002559 in OEIS) appearing in... A Ruth-Aaron pair consists of two consecutive integers (e. ... This article does not adequately cite its references or sources. ... The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... It has been suggested that Date magic square be merged into this article or section. ... One possible solution The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ... A super-Poulet number is a Poulet number whose every divisor d divides 2d - 2. ... A vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains all the digits from x and... In mathematics, a meander or closed meander is a self-avoiding closed curve which intersects a line a number of times. ... A Zeisel number is a square-free integer k with at least three prime factors which fall into the pattern where a and b are fixed constants and x is the index number of each prime factor in the factorization, sorted from lowest to highest. ... A self-descriptive number is an integer m that in a given base b is b-digits long in which each digit d at position n (the most significant digit being at position 0 and the least significant at position b - 1) counts how many instances of digit n are... In combinatorial mathematics, the Catalan numbers form a sequence of natural numbers that occur in various counting problems, often involving recursively defined objects. ... A vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains all the digits from x and... A highly totient number k is an integer that has more solutions to the equation &#966;(x) = k, where &#966; is Eulers totient function, than any integer below it. ... In mathematics, a polygonal number is a number that can be arranged as a regular polygon. ... A pentagonal pyramidal number is a number equal to the sum of the first few pentagonal numbers. ... A tiling with squares whose sides are successive Fibonacci numbers in length A Fibonacci spiral, created by drawing arcs connecting the opposite corners of squares in the Fibonacci tiling shown above - see golden spiral. ...

1500-1749

1501 - centered pentagonal number
1511 - Sophie Germain prime, balanced prime
1513 - centered square number
1518 - Mertens function zero
1519 - Mertens function zero
1520 - pentagonal number, Mertens function zero, forms a Ruth-Aaron pair with 1521 under second definition
1521 - 392, Mertens function zero, centered octagonal number, forms a Ruth-Aaron pair with 1520 under second definition
1523 - Mertens function zero, safe prime, member of the Mian-Chowla sequence
1524 - Mertens function zero
1525 - heptagonal number, Mertens function zero
1527 - Mertens function zero
1528 - Mertens function zero
1530 - vampire number
1531 - Mertens function zero
1532 - Mertens function zero
1535 - Thabit number
1537 - Keith number, Mertens function zero
1540 - triangular number, hexagonal number, decagonal number, tetrahedral number
1543 - Mertens function zero
1544 - Mertens function zero
1546 - Mertens function zero
1556 - sum of the squares of the first nine primes
1559 - Sophie Germain prime
1560 - pronic number
1564 - sum of totient function for first 71 integers
1572 - member of the Mian-Chowla sequence
1575 - odd abundant number
1583 - Sophie Germain prime
1588 - sum of totient function for first 72 integers
1593 - sum of the first 30 primes
1596 - triangular number
1597 - Fibonacci number, Markov number,Prime Number, emirp
1600 - 402, street number on Pennsylvania avenue of the White House, perfect score on SAT
1601 - Sophie Germain prime, the novel 1601 (Mark Twain)
1616 - the year Shakespeare died
1617 - pentagonal number
1618 - centered heptagonal number
1619 - safe prime
1625 - centered square number
1626 - centered pentagonal number
1633 - star number
1638 - harmonic divisor number
1639 - nonagonal number
1640 - pronic number
1649 - highly cototient number, Leyland number
1651 - heptagonal number
1653 - triangular number, hexagonal number
1657 - cuban prime
1660 - sum of totient function for first 73 integers
1666 - largest efficient pandigital number in Roman numerals (each symbol occurs exactly once)
1679 - highly cototient number
1680 - highly composite number
1681 - 412, smallest number yielded by the formula n2 + n + 41 that is not a prime; centered octagonal number
1682 - member of a Ruth-Aaron pair (first definition)
1683 - member of a Ruth-Aaron pair (first definition)
1695 - magic constant of n × n normal magic square and n-Queens Problem for n = 15.
1696 - sum of totient function for first 74 integers
1701 - decagonal number, hull number of the U.S.S. Enterprise on Star Trek
1705 - tribonacci number
1711 - triangular number
1717 - pentagonal number
1720 - sum of the first 31 primes
1722 - Giuga number, pronic number
1728 - the quantity expressed as 1000 in duodecimal, that is, the cube of twelve (called a great gross), and so, the number of cubic inches in a cubic foot
1729 - taxicab number, Carmichael number, Zeisel number, centered cube number. In the decimal expansion of e the first time all 10 digits appear in sequence starts at the 1729th decimal place. In 1979 the rock musical Hair closed on Broadway in New York City after 1729 performances.
1733 - Sophie Germain prime
1736 - sum of totient function for first 75 integers
1741 - centered square number
1747 - balanced prime

A vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains all the digits from x and... A Thabit number is an integer of the form . ... In mathematics, an abundant number or excessive number is a number n for which σ(n) > 2n. ... A tiling with squares whose sides are successive Fibonacci numbers in length A Fibonacci spiral, created by drawing arcs connecting the opposite corners of squares in the Fibonacci tiling shown above - see golden spiral. ... A Markov number or Markoff number is an integer x, y or z that is part of a solution to the Markov Diophantine equation The first few Markov numbers are 1, 2, 5, 13, 29, 34, 89, 169, 194, 233, 433, 610, 985, 1325, ... (sequence A002559 in OEIS) appearing in... In mathematics, a prime number (or a prime) is a positive integer that has exactly two (distinct) natural number divisors, which are 1 and the prime number itself. ... An emirp (prime spelt backwards) is a prime number that gives you a different prime when its digits are reversed (not a palindromic prime). ... For other uses, see White House (disambiguation). ... The SAT Reasoning Test is a standardized test for college admissions in the United States. ... [Date: 1601. ... A harmonic divisor number, or Ore number, is a number whose divisors, averaged in a harmonic mean, results in an integer. ... A cuban prime is a prime number that is a solution to one of two different specific equations involving third powers of x and y. ... The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... It has been suggested that Date magic square be merged into this article or section. ... One possible solution The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ... The current Star Trek franchise logo Star Trek is an American science fiction entertainment series. ... In mathematics, the Fibonacci numbers form a sequence defined recursively by: In words: you start with 0 and 1, and then produce the next Fibonacci number by adding the two previous Fibonacci numbers. ... A Giuga number is a composite number n such that each of its distinct prime factors pi is a divisor of . ... The duodecimal (also known as base-12 or dozenal) system is a numeral system using twelve as its base. ... Look up twelve in Wiktionary, the free dictionary. ... A great gross is equal to a dozen gross, i. ... An inch (plural: inches; symbol or abbreviation: in or, sometimes, ″ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ... A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, ′ – a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ... 1729 Cardinal One thousand seven hundred [and] twenty-nine Ordinal 1729th Factorization Divisors 7, 13, 19, 91, 133, 247 Roman numeral MDCCXXIX Binary 11011000001 Octal 3301 Duodecimal 1001 Hexadecimal 6C1 1729 is known as the Hardy-Ramanujan number, after a famous anecdote of the British mathematician G. H. Hardy regarding... In mathematics, the n-th taxicab number, typically denoted Ta(n) or Taxicab(n), is defined as the smallest number which can be expressed as a sum of two positive cubes in n distinct ways, up to order of summands. ... e is the unique number such that the value of the derivative (slope of a tangent line) of f (x)=ex (blue curve) at the point x=0 is exactly 1. ... Hair, subtitled The American Tribal Love/Rock Musical, is a musical about hippies and was a significant part of the drug, music and peace-love culture of the 1960s. ...

1750-1999

1753 - balanced prime
1756 - centered pentagonal number
1764 - 422
1770 - triangular number, hexagonal number, Town of Seventeen Seventy in Australia
1771 - tetrahedral number
1772 - centered heptagonal number, sum of totient function for first 76 integers
1782 - heptagonal number
1785 - square pyramidal number
1791 - largest natural number that cannot be expressed as a sum of at most four hexagonal numbers.
1794 - nonagonal number
1800 - pentagonal pyramidal number, also, in da Ponte's Don Giovanni, the number of women Don Giovanni had slept with so far when confronted by Donna Elvira, according to Leporello's tally
1801 - cuban prime
1806 - pronic number, product of first four terms of Sylvester's sequence, primary pseudoperfect number
1807 - fifth term of Sylvester's sequence
1811 - Sophie Germain prime
1820 - pentagonal number, pentatope number
1821 - member of the Mian-Chowla sequence
1823 - safe prime
1827 - vampire number
1828 - meandric number, open meandric number
1830 - triangular number
1832 - sum of totient function for first 77 integers
1834 - octahedral number, sum of the cubes of the first five primes
1836 - factor by which a proton is more massive than an electron
1837 - star number
1841 - Mertens function zero
1843 - Mertens function zero
1844 - Mertens function zero
1845 - Mertens function zero
1849 - 432, centered octagonal number
1851 - sum of the first 32 primes
1853 - Mertens function zero
1854 - Mertens function zero
1856 - sum of totient function for first 78 integers
1857 - Mertens function zero
1861 - centered square number, Mertens function zero
1862 - Mertens function zero, forms a Ruth-Aaron pair with 1863 under second definition
1863 - Mertens function zero, forms a Ruth-Aaron pair with 1862 under second definition
1864 - Mertens function zero
1866 - Mertens function zero
1870 - decagonal number
1885 - Zeisel number
1889 - Sophie Germain prime, highly cototient number
1891 - triangular number, hexagonal number, centered pentagonal number
1892 - pronic number
1896 - member of the Mian-Chowla sequence
1897 - member of Padovan sequence
1900 - 1900 or Novecento is a 1977 movie
1901 - Sophie Germain prime
1907 - safe prime, balanced prime
1918 - heptagonal number
1926 - pentagonal number
1929 - Mertens function zero
1931 - Sophie Germain prime
1933 - centered heptagonal number
1934 - sum of totient function for first 79 integers
1936 - 442
1938 - Mertens function zero
1951 - cuban prime
1953 - triangular number
1956 - nonagonal number
1966 - sum of totient function for first 80 integers
1969 - the movie 1969 (film)
1973 - Sophie Germain prime
1980 - pronic number
1984 - 11111000000 in binary also see 1984 (disambiguation)
1985 - centered square number
1988 - sum of the first 33 primes

A hexagonal number is a figurate number that represents a hexagon. ... Don Giovanni (K.527) is an opera in two acts with music by Wolfgang Amadeus Mozart and libretto by Lorenzo da Ponte. ... Sylvesters sequence consists of the coprime denominators of an Egyptian fraction that adds up to 1. ... In mathematics, and in particular number theory, a primary pseudoperfect number is a number N that satisfies the Egyptian fraction equation where the sum is over only the prime divisors of N. Equivalently (as can be seen by multiplying this equation by N), Except for the exceptional primary pseudoperfect number... A vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains all the digits from x and... In mathematics, a meander or closed meander is a self-avoiding closed curve which intersects a line a number of times. ... In mathematics, a meander or closed meander is a self-avoiding closed curve which intersects a line a number of times. ... In physics, the proton (Greek proton = first) is a subatomic particle with an electric charge of one positive fundamental unit (1. ... e- redirects here. ... Movie poster for 1900 1900 (also called Novecento) is a 1976 epic film starring Robert de Niro, Gerard Depardieu, and Burt Lancaster, directed by Bernardo Bertolucci. ... 1969 is a 1988 film starring Robert Downey Jr. ... The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... 1984 may refer to: 1984, the year 1984, the number 1984, a band formed by Brian May prior to the creation of his hugely successful band Queen Nineteen Eighty-Four, a 1949 novel by George Orwell Nineteen Eighty-Four (TV programme), a 1954 television adaptation by the BBC 1984 (1956...

Reference

  • Meehan, Eileen R., Why TV is not our fault : television programming, viewers, and who's really in control Lanham, MD: Rowman & Littlefield, 2005

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1000 (number) - Wikipedia, the free encyclopedia (1000 words)
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