25802 has 16 divisors (see below), whose sum is σ = 47040. Its totient is φ = 10368.

The previous prime is 25801. The next prime is 25819. The reversal of 25802 is 20852.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25801) 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 7 ways as a sum of consecutive naturals, for example, 218 + ... + 314.

It is an arithmetic number, because the mean of its divisors is an integer number (2940).

2²⁵⁸⁰² is an apocalyptic number.

25802 is a deficient number, since it is larger than the sum of its proper divisors (21238).

25802 is a wasteful number, since it uses less digits than its factorization.

25802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 25802 is about 160.6300096495. The cubic root of 25802 is about 29.5495671521.

Subtracting from 25802 its reverse (20852), we obtain a triangular number (4950 = T₉₉).

The spelling of 25802 in words is "twenty-five thousand, eight hundred two".