25544 has 16 divisors (see below), whose sum is σ = 49920. Its totient is φ = 12240.

The previous prime is 25541. The next prime is 25561. The reversal of 25544 is 44552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197 + ... + 299.

It is an arithmetic number, because the mean of its divisors is an integer number (3120).

2²⁵⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

25544 is a deficient number, since it is larger than the sum of its proper divisors (24376).

25544 is a wasteful number, since it uses less digits than its factorization.

25544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 136 counting only the distinct ones).

The product of its digits is 800, while the sum is 20.

The square root of 25544 is about 159.8249041921. The cubic root of 25544 is about 29.4507461164.

The spelling of 25544 in words is "twenty-five thousand, five hundred forty-four".