25911265 has 4 divisors (see below), whose sum is σ = 31093524. Its totient is φ = 20729008.

The previous prime is 25911253. The next prime is 25911293. The reversal of 25911265 is 56211952.

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 16418704 + 9492561 = 4052^2 + 3081^2 .

It is a cyclic number.

It is not a de Polignac number, because 25911265 - 2⁵ = 25911233 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2591122 + ... + 2591131.

It is an arithmetic number, because the mean of its divisors is an integer number (7773381).

Almost surely, 2^25911265 is an apocalyptic number.

It is an amenable number.

25911265 is a deficient number, since it is larger than the sum of its proper divisors (5182259).

25911265 is an equidigital number, since it uses as much as digits as its factorization.

25911265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5182258.

The product of its digits is 5400, while the sum is 31.

The square root of 25911265 is about 5090.3108942382. The cubic root of 25911265 is about 295.9122007980.

The spelling of 25911265 in words is "twenty-five million, nine hundred eleven thousand, two hundred sixty-five".