Is 143 a prime number?

No, 143 is composite. It is divisible by 11 and 13.

Factors of 143

The factors of 143 are 1, 11, 13 and 143. That is 4 factors in total.

A factor of 143 is a whole number that divides 143 exactly, with no remainder. 143 is a composite number because it has factors other than 1 and itself.

Factor pairs of 143

Two numbers that multiply to give 143:

1 × 143 = 143
11 × 13 = 143

Prime factorization of 143

143 = 11 × 13. The prime factors of 143 are 11 and 13.

Quick facts about 143

Is 143 prime? No.
Even or odd: odd.
Sum of its factors: 1 + 11 + 13 + 143 = 168.

Factors of nearby numbers

Number	Factors
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
144	15 factors
145	1, 5, 29, 145
146	1, 2, 73, 146
147	1, 3, 7, 21, 49, 147

More about 143: 143 squared · square root of 143 · 143 in binary · 143 in Roman numerals.

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