25524 has 18 divisors (see below), whose sum is σ = 64610. Its totient is φ = 8496.

The previous prime is 25523. The next prime is 25537. The reversal of 25524 is 42552.

25524 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 17424 + 8100 = 132^2 + 90^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 25497 and 25506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 319 + ... + 390.

2²⁵⁵²⁴ is an apocalyptic number.

It is an amenable number.

25524 is an abundant number, since it is smaller than the sum of its proper divisors (39086).

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

25524 is a wasteful number, since it uses less digits than its factorization.

25524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 714 counting only the distinct ones).

The product of its digits is 400, while the sum is 18.

The square root of 25524 is about 159.7623234683. The cubic root of 25524 is about 29.4430578306.

It can be divided in two parts, 2552 and 4, that added together give a triangular number (2556 = T₇₁).

The spelling of 25524 in words is "twenty-five thousand, five hundred twenty-four".