251265 has 16 divisors (see below), whose sum is σ = 459648. Its totient is φ = 114816.

The previous prime is 251263. The next prime is 251287. The reversal of 251265 is 562152.

251265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 251265 - 2¹ = 251263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 251265.

It is not an unprimeable number, because it can be changed into a prime (251261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1092 + ... + 1301.

It is an arithmetic number, because the mean of its divisors is an integer number (28728).

2²⁵¹²⁶⁵ is an apocalyptic number.

It is an amenable number.

251265 is a deficient number, since it is larger than the sum of its proper divisors (208383).

251265 is a wasteful number, since it uses less digits than its factorization.

251265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408.

The product of its digits is 600, while the sum is 21.

The square root of 251265 is about 501.2634038108. The cubic root of 251265 is about 63.1021271247.

The spelling of 251265 in words is "two hundred fifty-one thousand, two hundred sixty-five".