even, composite · 1000th positive integer
The number 1000
1000 is an even composite number. It's known as a millennium. It is the 1000th positive integer.
Quick reference
| Prime factorization | 2 × 2 × 2 × 5 × 5 × 5 |
| Divisors | 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000 |
| Binary | 1111101000 |
| Hexadecimal | 0x3E8 |
| Roman numeral | M |
| Digit sum | 1 |
| Properties | even, composite |
Why 1000 is notable
A millennium.
Reading 1000 in NumGrid context
1000 is one of the data points covered by this site’s integer properties and number-guessing puzzles dataset. The detail above comes directly from classical number theory plus NumGrid solver-derived puzzle statistics; the context that follows situates the headline numbers against the broader distribution across positive integers within the NumGrid target pool.
The methodology behind every numeric value on this page is publicly documented on the classical number theory plus NumGrid solver-derived puzzle statistics portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for 1000 is typically a peer within positive integers within the NumGrid target pool with similar size, similar exposure, or similar geography — not the national-level summary alone.
Frequently asked
Is 1000 a prime number?
No. 1000 is composite. Its prime factorization is 2 × 2 × 2 × 5 × 5 × 5.
What are the factors of 1000?
The factors (divisors) of 1000 are 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000.
What is 1000 in binary?
1000 in binary is 1111101000. In hexadecimal it's 3E8.
What is 1000 as a Roman numeral?
1000 in Roman numerals is M.
What's the digit sum of 1000?
Adding the digits of 1000: 1 + 0 + 0 + 0 = 1.