281265 has 16 divisors (see below), whose sum is σ = 476928. Its totient is φ = 141056.

The previous prime is 281251. The next prime is 281273. The reversal of 281265 is 562182.

281265 = 5² + 6² + ... + 94².

It is a cyclic number.

It is not a de Polignac number, because 281265 - 2⁴ = 281249 is a prime.

It is a super-2 number, since 2×281265² = 158220000450, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281265.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297 + ... + 806.

It is an arithmetic number, because the mean of its divisors is an integer number (29808).

2²⁸¹²⁶⁵ is an apocalyptic number.

It is an amenable number.

281265 is a deficient number, since it is larger than the sum of its proper divisors (195663).

281265 is a wasteful number, since it uses less digits than its factorization.

281265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its digits is 960, while the sum is 24.

The square root of 281265 is about 530.3442278370. The cubic root of 281265 is about 65.5196996085.

The spelling of 281265 in words is "two hundred eighty-one thousand, two hundred sixty-five".