No, 126 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
126 has divisors other than 1 and itself. The smallest is 2: 126 ÷ 2 = 63.
Prime factorization: 126 = 2 × 3 × 3 × 7 = 2 × 3² × 7.
| Number | Prime? |
|---|---|
| 122 | No, 2 × 61 |
| 123 | No, 3 × 41 |
| 124 | No, 2 × 2 × 31 |
| 125 | No, 5 × 5 × 5 |
| 127 | Yes |
| 128 | No, 2 × 2 × 2 × 2 × 2 × 2 × 2 |
| 129 | No, 3 × 43 |
| 130 | No, 2 × 5 × 13 |
More about 126: factors of 126 · 126 squared · square root of 126 · 126 in binary · 126 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.