25231265 has 4 divisors (see below), whose sum is σ = 30277524. Its totient is φ = 20185008.

The previous prime is 25231249. The next prime is 25231279. The reversal of 25231265 is 56213252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3066001 + 22165264 = 1751^2 + 4708^2 .

It is a cyclic number.

It is not a de Polignac number, because 25231265 - 2⁴ = 25231249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2523122 + ... + 2523131.

It is an arithmetic number, because the mean of its divisors is an integer number (7569381).

Almost surely, 2^25231265 is an apocalyptic number.

It is an amenable number.

25231265 is a deficient number, since it is larger than the sum of its proper divisors (5046259).

25231265 is an equidigital number, since it uses as much as digits as its factorization.

25231265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5046258.

The product of its digits is 3600, while the sum is 26.

The square root of 25231265 is about 5023.0732624560. The cubic root of 25231265 is about 293.3006384301.

The spelling of 25231265 in words is "twenty-five million, two hundred thirty-one thousand, two hundred sixty-five".