25902 has 12 divisors (see below), whose sum is σ = 56160. Its totient is φ = 8628.

The previous prime is 25889. The next prime is 25903. The reversal of 25902 is 20952.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1439 = 25902 / (2 + 5 + 9 + 0 + 2).

It is an Ulam number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25902.

It is not an unprimeable number, because it can be changed into a prime (25903) by changing a digit.

25902 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 702 + ... + 737.

It is an arithmetic number, because the mean of its divisors is an integer number (4680).

2²⁵⁹⁰² is an apocalyptic number.

25902 is an abundant number, since it is smaller than the sum of its proper divisors (30258).

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

25902 is a wasteful number, since it uses less digits than its factorization.

25902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447 (or 1444 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 25902 is about 160.9409829720. The cubic root of 25902 is about 29.5876927165.

Subtracting from 25902 its reverse (20952), we obtain a triangular number (4950 = T₉₉).

The spelling of 25902 in words is "twenty-five thousand, nine hundred two".