25624913 has 4 divisors (see below), whose sum is σ = 25648740. Its totient is φ = 25601088.

The previous prime is 25624903. The next prime is 25624927. The reversal of 25624913 is 31942652.

It is a happy number.

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 744769 + 24880144 = 863^2 + 4988^2 .

It is a cyclic number.

It is not a de Polignac number, because 25624913 - 2⁸ = 25624657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25624913.

It is not an unprimeable number, because it can be changed into a prime (25624903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10220 + ... + 12477.

It is an arithmetic number, because the mean of its divisors is an integer number (6412185).

Almost surely, 2^25624913 is an apocalyptic number.

It is an amenable number.

25624913 is a deficient number, since it is larger than the sum of its proper divisors (23827).

25624913 is a wasteful number, since it uses less digits than its factorization.

25624913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23826.

The product of its digits is 12960, while the sum is 32.

The square root of 25624913 is about 5062.1055895744. The cubic root of 25624913 is about 294.8180933500.

The spelling of 25624913 in words is "twenty-five million, six hundred twenty-four thousand, nine hundred thirteen".