Is 140 a prime number?

No, 140 is composite. It is divisible by 2, 4, 5, 7, 10, 14, 20, 28, 35 and 70.

Factors of 140

The factors of 140 are 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70 and 140. That is 12 factors in total.

A factor of 140 is a whole number that divides 140 exactly, with no remainder. 140 is a composite number because it has factors other than 1 and itself.

Factor pairs of 140

Two numbers that multiply to give 140:

1 × 140 = 140
2 × 70 = 140
4 × 35 = 140
5 × 28 = 140
7 × 20 = 140
10 × 14 = 140

Prime factorization of 140

140 = 2 × 2 × 5 × 7 = 2² × 5 × 7. The prime factors of 140 are 2, 5 and 7.

Quick facts about 140

Is 140 prime? No.
Even or odd: even.
Sum of its factors: 1 + 2 + 4 + 5 + 7 + 10 + 14 + 20 + 28 + 35 + 70 + 140 = 336.

Factors of nearby numbers

Number	Factors
136	1, 2, 4, 8, 17, 34, 68, 136
137	1, 137
138	1, 2, 3, 6, 23, 46, 69, 138
139	1, 139
141	1, 3, 47, 141
142	1, 2, 71, 142
143	1, 11, 13, 143
144	15 factors

More about 140: 140 squared · square root of 140 · 140 in binary · 140 in Roman numerals.

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