No, 105 is not a prime number. It is a composite number: it ends in 5, so it is divisible by 5.
105 has divisors other than 1 and itself. The smallest is 3: 105 ÷ 3 = 35.
Prime factorization: 105 = 3 × 5 × 7.
| Number | Prime? |
|---|---|
| 101 | Yes |
| 102 | No, 2 × 3 × 17 |
| 103 | Yes |
| 104 | No, 2 × 2 × 2 × 13 |
| 106 | No, 2 × 53 |
| 107 | Yes |
| 108 | No, 2 × 2 × 3 × 3 × 3 |
| 109 | Yes |
More about 105: factors of 105 · 105 squared · square root of 105 · 105 in binary · 105 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.