25604489 has 4 divisors (see below), whose sum is σ = 25674624. Its totient is φ = 25534356.

The previous prime is 25604473. The next prime is 25604507. The reversal of 25604489 is 98440652.

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 not a de Polignac number, because 25604489 - 2⁴ = 25604473 is a prime.

It is a super-2 number, since 2×25604489² = 1311179713902242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25604389) 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, 34517 + ... + 35250.

It is an arithmetic number, because the mean of its divisors is an integer number (6418656).

Almost surely, 2^25604489 is an apocalyptic number.

It is an amenable number.

25604489 is a deficient number, since it is larger than the sum of its proper divisors (70135).

25604489 is an equidigital number, since it uses as much as digits as its factorization.

25604489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70134.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 25604489 is about 5060.0878450873. The cubic root of 25604489 is about 294.7397455692.

It can be divided in two parts, 2560448 and 9, that multiplied together give a palindrome (23044032).

The spelling of 25604489 in words is "twenty-five million, six hundred four thousand, four hundred eighty-nine".