Is 490 a prime number?
No, 490 is not a prime number. It is divisible by 2: 490 = 2 × 245.
Is 490 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 √490 ≈ 22.14. If none of them divides 490, it is prime.
- 3
2 divides 490 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 490 = 2 \times 5 \times 7^{2} \]Testing 490 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 490 ÷ 2 | divides exactly (245) |
| 3 | 490 ÷ 3 | leaves 1 |
| 5 | 490 ÷ 5 | divides exactly (98) |
| 7 | 490 ÷ 7 | divides exactly (70) |
| 11 | 490 ÷ 11 | leaves 6 |
| 13 | 490 ÷ 13 | leaves 9 |
| 17 | 490 ÷ 17 | leaves 14 |
| 19 | 490 ÷ 19 | leaves 15 |
Questions
Is 490 a prime number?
No, 490 is not a prime number. It is divisible by 2: 490 = 2 × 245.
What is the next prime after 490?
491.
What is the prime number before 490?
487.
What are the factors of 490?
1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490.