No, 240 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
240 has divisors other than 1 and itself. The smallest is 2: 240 ÷ 2 = 120.
Prime factorization: 240 = 2 × 2 × 2 × 2 × 3 × 5 = 2⁴ × 3 × 5.
| Number | Prime? |
|---|---|
| 236 | No, 2 × 2 × 59 |
| 237 | No, 3 × 79 |
| 238 | No, 2 × 7 × 17 |
| 239 | Yes |
| 241 | Yes |
| 242 | No, 2 × 11 × 11 |
| 243 | No, 3 × 3 × 3 × 3 × 3 |
| 244 | No, 2 × 2 × 61 |
More about 240: factors of 240 · 240 in binary.
Another number? Use the prime number checker for any value, or see the list of prime numbers.