Number 281 is a prime number.

A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. Therefore we consider 281 as a prime number, because:

- 281 is a natural number greater than 1,
- 281 is not a product of 2 smaller natural numbers (it can be divided only by 1 and itself)

Number of factors: 2.

List of factors/divisors: 1, 281.

Parity: 281 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 1 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 274 no | 275 no | 276 no | 277 yes | 278 no | 279 no | 280 no | 281 yes | 282 no | 283 yes | 284 no | 285 no | 286 no | 287 no | 288 no |
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