Is 129 a prime number?

No, 129 is composite. It is divisible by 3 and 43.

Factors of 129

The factors of 129 are 1, 3, 43 and 129. That is 4 factors in total.

A factor of 129 is a whole number that divides 129 exactly, with no remainder. 129 is a composite number because it has factors other than 1 and itself.

Factor pairs of 129

Two numbers that multiply to give 129:

1 × 129 = 129
3 × 43 = 129

Prime factorization of 129

129 = 3 × 43. The prime factors of 129 are 3 and 43.

Quick facts about 129

Is 129 prime? No.
Even or odd: odd.
Sum of its factors: 1 + 3 + 43 + 129 = 176.

Factors of nearby numbers

Number	Factors
125	1, 5, 25, 125
126	1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126
127	1, 127
128	1, 2, 4, 8, 16, 32, 64, 128
130	1, 2, 5, 10, 13, 26, 65, 130
131	1, 131
132	1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 132
133	1, 7, 19, 133

More about 129: 129 squared · square root of 129 · 129 in binary · 129 in Roman numerals.

Another number? Try the prime number checker, the GCF and LCM calculator or see all factor lists.