Number 381 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 381 as a prime number, because it can be written as a product of two smaller natural numbers (check the factors of number 381 below).

Number of factors: 4.

List of factors/divisors: 1, 3, 127, 381.

Parity: 381 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 131 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 374 no | 375 no | 376 no | 377 no | 378 no | 379 yes | 380 no | 381 no | 382 no | 383 yes | 384 no | 385 no | 386 no | 387 no | 388 no |
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