No, 1,000 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
1,000 has divisors other than 1 and itself. The smallest is 2: 1,000 ÷ 2 = 500.
Prime factorization: 1,000 = 2 × 2 × 2 × 5 × 5 × 5 = 2³ × 5³.
| Number | Prime? |
|---|---|
| 949 | No, 13 × 73 |
| 971 | Yes |
| 991 | Yes |
| 997 | Yes |
| 1,001 | No, 7 × 11 × 13 |
| 1,009 | Yes |
| 1,024 | No, 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 |
| 1,049 | Yes |
More about 1000: factors of 1000 · 1000 squared · square root of 1000 · 1000 in binary · 1000 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.