25504 has 12 divisors (see below), whose sum is σ = 50274. Its totient is φ = 12736.

The previous prime is 25471. The next prime is 25523. The reversal of 25504 is 40552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21904 + 3600 = 148^2 + 60^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 367 + ... + 430.

2²⁵⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

25504 is a deficient number, since it is larger than the sum of its proper divisors (24770).

25504 is an equidigital number, since it uses as much as digits as its factorization.

25504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 25504 is about 159.6997182214. The cubic root of 25504 is about 29.4353655276.

It can be divided in two parts, 25 and 504, that added together give a square (529 = 23²).

The spelling of 25504 in words is "twenty-five thousand, five hundred four".