Number 143 is not a prime number. It is a composite number.

A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. We do not consider 143 as a prime number, because it can be written as a product of two smaller natural numbers (check the factors of number 143 below).

Number of factors: 4.

List of factors/divisors: 1, 11, 13, 143.

Parity: 143 is an odd number.

Perfect square: no (a square number or perfect square is an integer that is the square of an integer).

Perfect number: no, because the sum of its proper divisors is 25 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 136 no | 137 yes | 138 no | 139 yes | 140 no | 141 no | 142 no | 143 no | 144 no | 145 no | 146 no | 147 no | 148 no | 149 yes | 150 no |
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