No, 142 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
142 has divisors other than 1 and itself. The smallest is 2: 142 ÷ 2 = 71.
Prime factorization: 142 = 2 × 71.
| Number | Prime? |
|---|---|
| 138 | No, 2 × 3 × 23 |
| 139 | Yes |
| 140 | No, 2 × 2 × 5 × 7 |
| 141 | No, 3 × 47 |
| 143 | No, 11 × 13 |
| 144 | No, 2 × 2 × 2 × 2 × 3 × 3 |
| 145 | No, 5 × 29 |
| 146 | No, 2 × 73 |
More about 142: factors of 142 · 142 squared · square root of 142 · 142 in binary · 142 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.