No, 425 is not a prime number. It is a composite number: it ends in 5, so it is divisible by 5.
425 has divisors other than 1 and itself. The smallest is 5: 425 ÷ 5 = 85.
Prime factorization: 425 = 5 × 5 × 17 = 5² × 17.
| Number | Prime? |
|---|---|
| 421 | Yes |
| 422 | No, 2 × 211 |
| 423 | No, 3 × 3 × 47 |
| 424 | No, 2 × 2 × 2 × 53 |
| 426 | No, 2 × 3 × 71 |
| 427 | No, 7 × 61 |
| 428 | No, 2 × 2 × 107 |
| 429 | No, 3 × 11 × 13 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.