25624 has 8 divisors (see below), whose sum is σ = 48060. Its totient is φ = 12808.

The previous prime is 25621. The next prime is 25633. The reversal of 25624 is 42652.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×25624³ = 50473338511872, which contains 333 as substring.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1594 + ... + 1609.

2²⁵⁶²⁴ is an apocalyptic number.

It is an amenable number.

25624 is a deficient number, since it is larger than the sum of its proper divisors (22436).

25624 is a wasteful number, since it uses less digits than its factorization.

25624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209 (or 3205 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The square root of 25624 is about 160.0749824301. The cubic root of 25624 is about 29.4814591912.

The spelling of 25624 in words is "twenty-five thousand, six hundred twenty-four".