Is 4221 a prime number?
No, 4221 is not a prime number. It is divisible by 3: 4221 = 3 × 1407.
Is 4221 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 √4221 ≈ 64.97. If none of them divides 4221, it is prime.
- 3
3 divides 4221 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 4221 = 3^{2} \times 7 \times 67 \]Testing 4221 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 4221 ÷ 2 | leaves 1 |
| 3 | 4221 ÷ 3 | divides exactly (1407) |
| 5 | 4221 ÷ 5 | leaves 1 |
| 7 | 4221 ÷ 7 | divides exactly (603) |
| 11 | 4221 ÷ 11 | leaves 8 |
| 13 | 4221 ÷ 13 | leaves 9 |
| 17 | 4221 ÷ 17 | leaves 5 |
| 19 | 4221 ÷ 19 | leaves 3 |
| 23 | 4221 ÷ 23 | leaves 12 |
| 29 | 4221 ÷ 29 | leaves 16 |
| 31 | 4221 ÷ 31 | leaves 5 |
| 37 | 4221 ÷ 37 | leaves 3 |
Questions
Is 4221 a prime number?
No, 4221 is not a prime number. It is divisible by 3: 4221 = 3 × 1407.
What is the next prime after 4221?
4229.
What is the prime number before 4221?
4219.
What are the factors of 4221?
1, 3, 7, 9, 21, 63, 67, 201, 469, 603, 1407, 4221.