Is 425 a prime number?
No, 425 is not a prime number. It is divisible by 5: 425 = 5 × 85.
Is 425 prime?
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A prime number has exactly two factors: 1 and itself.
- 2
It is enough to test the primes up to √425 ≈ 20.62. If none of them divides 425, it is prime.
- 3
5 divides 425 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 425 = 5^{2} \times 17 \]Testing 425 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 425 ÷ 2 | leaves 1 |
| 3 | 425 ÷ 3 | leaves 2 |
| 5 | 425 ÷ 5 | divides exactly (85) |
| 7 | 425 ÷ 7 | leaves 5 |
| 11 | 425 ÷ 11 | leaves 7 |
| 13 | 425 ÷ 13 | leaves 9 |
| 17 | 425 ÷ 17 | divides exactly (25) |
| 19 | 425 ÷ 19 | leaves 7 |
Questions
Is 425 a prime number?
No, 425 is not a prime number. It is divisible by 5: 425 = 5 × 85.
What is the next prime after 425?
431.
What is the prime number before 425?
421.
What are the factors of 425?
1, 5, 17, 25, 85, 425.