No, 2,001 is not a prime number. It is a composite number: its digits add up to 3, which is divisible by 3, so 2001 is divisible by 3.
2,001 has divisors other than 1 and itself. The smallest is 3: 2,001 ÷ 3 = 667.
Prime factorization: 2,001 = 3 × 23 × 29.
| Number | Prime? |
|---|---|
| 1,729 | No, 7 × 13 × 19 |
| 1,801 | Yes |
| 1,901 | Yes |
| 1,999 | Yes |
| 2,003 | Yes |
| 2,017 | Yes |
| 2,020 | No, 2 × 2 × 5 × 101 |
| 2,021 | No, 43 × 47 |
More about 2001: 2001 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.