25590 has 16 divisors (see below), whose sum is σ = 61488. Its totient is φ = 6816.

The previous prime is 25589. The next prime is 25601. The reversal of 25590 is 9552.

25590 is nontrivially palindromic in base 9.

25590 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

25590 is strictly pandigital in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397 + ... + 456.

It is an arithmetic number, because the mean of its divisors is an integer number (3843).

2²⁵⁵⁹⁰ is an apocalyptic number.

25590 is an abundant number, since it is smaller than the sum of its proper divisors (35898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30744).

25590 is a wasteful number, since it uses less digits than its factorization.

25590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 25590 is about 159.9687469476. The cubic root of 25590 is about 29.4684139565.

The spelling of 25590 in words is "twenty-five thousand, five hundred ninety".