Is 138 a prime number?

No, 138 is composite. It is divisible by 2, 3, 6, 23, 46 and 69.

Factors of 138

The factors of 138 are 1, 2, 3, 6, 23, 46, 69 and 138. That is 8 factors in total.

A factor of 138 is a whole number that divides 138 exactly, with no remainder. 138 is a composite number because it has factors other than 1 and itself.

Factor pairs of 138

Two numbers that multiply to give 138:

1 × 138 = 138
2 × 69 = 138
3 × 46 = 138
6 × 23 = 138

Prime factorization of 138

138 = 2 × 3 × 23. The prime factors of 138 are 2, 3 and 23.

Quick facts about 138

Is 138 prime? No.
Even or odd: even.
Sum of its factors: 1 + 2 + 3 + 6 + 23 + 46 + 69 + 138 = 288.

Factors of nearby numbers

Number	Factors
134	1, 2, 67, 134
135	1, 3, 5, 9, 15, 27, 45, 135
136	1, 2, 4, 8, 17, 34, 68, 136
137	1, 137
139	1, 139
140	1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
141	1, 3, 47, 141
142	1, 2, 71, 142

More about 138: 138 squared · square root of 138 · 138 in binary · 138 in Roman numerals.

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