Is 5421 a prime number?
No, 5421 is not a prime number. It is divisible by 3: 5421 = 3 × 1807.
Is 5421 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 √5421 ≈ 73.63. If none of them divides 5421, it is prime.
- 3
3 divides 5421 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 5421 = 3 \times 13 \times 139 \]
Testing 5421 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 5421 ÷ 2 | leaves 1 |
| 3 | 5421 ÷ 3 | divides exactly (1807) |
| 5 | 5421 ÷ 5 | leaves 1 |
| 7 | 5421 ÷ 7 | leaves 3 |
| 11 | 5421 ÷ 11 | leaves 9 |
| 13 | 5421 ÷ 13 | divides exactly (417) |
| 17 | 5421 ÷ 17 | leaves 15 |
| 19 | 5421 ÷ 19 | leaves 6 |
| 23 | 5421 ÷ 23 | leaves 16 |
| 29 | 5421 ÷ 29 | leaves 27 |
| 31 | 5421 ÷ 31 | leaves 27 |
| 37 | 5421 ÷ 37 | leaves 19 |
Questions
Is 5421 a prime number?
No, 5421 is not a prime number. It is divisible by 3: 5421 = 3 × 1807.
What is the next prime after 5421?
5431.
What is the prime number before 5421?
5419.
What are the factors of 5421?
1, 3, 13, 39, 139, 417, 1807, 5421.