Number: | 1000 |
Divisor: | 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000 |
Roman Unicode: | M, m, ↀ |
Unicode: | ↀ |
Greek Prefix: | chilia |
Latin Prefix: | milli |
Lang1: | Tamil |
Lang1 Symbol: | ௲ |
Lang2: | Chinese |
Lang2 Symbol: | 千 |
Lang3: | Punjabi |
Lang3 Symbol: | ੧੦੦੦ |
Lang4: | Devanagari |
Lang4 Symbol: | १००० |
Lang5: | Armenian |
Lang5 Symbol: | Ռ |
Lang6: | Egyptian hieroglyph |
Lang6 Symbol: |
1000 or one thousand is the natural number following 999 and preceding 1001. In most English-speaking countries, it can be written with or without a comma or sometimes a period separating the thousands digit: 1,000.
A group of one thousand things is sometimes known, from Ancient Greek, as a chiliad.[1] A period of one thousand years may be known as a chiliad or, more often from Latin, as a millennium. The number 1000 is also sometimes described as a short thousand in medieval contexts where it is necessary to distinguish the Germanic concept of 1200 as a long thousand.
1000 is the 10th icositetragonal number, or 24-gonal number. It is also the 16th generalized 30-gonal number.
1000 is the Wiener index of cycle length 20, also the sum of labeled boxes arranged as a pyramid with base 1 – 20.[2] [3]
1000 is the element of multiplicity in a
24 x 24
1000 is the number of strict partitions of 50 containing the sum of no subset of the parts.
A chiliagon is a 1000-sided polygon,[5] of order 2000 in its regular form.
1000 has a reduced totient value
λ(n)
\varphi(n)
11 integers have a totient value of 1000 (1111, 1255, ..., 3750).
\Phi(n)
In decimal, multiples of one thousand are totient values of four-digit repdigits:
In the list of composite numbers, 7777 is very nearly the composite index of 8888: 8886 is the 7779th composite number.[7] Also,
1600 = 402 is the totient value of 4000, as well as 6000, whose collective sum is 10000, where 6000 is the totient of 9999, one less than 104.
The sum of the first nine prime numbers up to 23 is 100, with
\varphi(p(23))=1000
p(23)=1255
Using decimal representation as well,
On the other hand, the largest prime number less than 10000 is the 1229th prime number, 9973.
1000 is also the smallest number in base-ten that generates three primes in the fastest way possible by concatenation with decremented numbers:[9] all represent prime numbers.