Is 12 a prime number?
No, 12 is not a prime number. It is divisible by 2: 12 = 2 × 6.
Is 12 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 √12 ≈ 3.46. If none of them divides 12, it is prime.
- 3
2 divides 12 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 12 = 2^{2} \times 3 \]Testing 12 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 12 ÷ 2 | divides exactly (6) |
| 3 | 12 ÷ 3 | divides exactly (4) |
Questions
Is 12 a prime number?
No, 12 is not a prime number. It is divisible by 2: 12 = 2 × 6.
What is the next prime after 12?
13.
What is the prime number before 12?
11.
What are the factors of 12?
1, 2, 3, 4, 6, 12.