No, 402 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
402 has divisors other than 1 and itself. The smallest is 2: 402 ÷ 2 = 201.
Prime factorization: 402 = 2 × 3 × 67.
| Number | Prime? |
|---|---|
| 398 | No, 2 × 199 |
| 399 | No, 3 × 7 × 19 |
| 400 | No, 2 × 2 × 2 × 2 × 5 × 5 |
| 401 | Yes |
| 403 | No, 13 × 31 |
| 404 | No, 2 × 2 × 101 |
| 405 | No, 3 × 3 × 3 × 3 × 5 |
| 406 | No, 2 × 7 × 29 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.