25604513 has 4 divisors (see below), whose sum is σ = 27932208. Its totient is φ = 23276820.

The previous prime is 25604507. The next prime is 25604539. The reversal of 25604513 is 31540652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25604513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25604573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1163831 + ... + 1163852.

It is an arithmetic number, because the mean of its divisors is an integer number (6983052).

Almost surely, 2^25604513 is an apocalyptic number.

It is an amenable number.

25604513 is a deficient number, since it is larger than the sum of its proper divisors (2327695).

25604513 is a wasteful number, since it uses less digits than its factorization.

25604513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327694.

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

The square root of 25604513 is about 5060.0902165871. The cubic root of 25604513 is about 294.7398376592.

The spelling of 25604513 in words is "twenty-five million, six hundred four thousand, five hundred thirteen".