25804 has 6 divisors (see below), whose sum is σ = 45164. Its totient is φ = 12900.

The previous prime is 25801. The next prime is 25819. The reversal of 25804 is 40852.

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 as a sum of consecutive naturals, namely, 3222 + ... + 3229.

2²⁵⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

25804 is a deficient number, since it is larger than the sum of its proper divisors (19360).

25804 is a wasteful number, since it uses less digits than its factorization.

25804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6455 (or 6453 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 25804 is about 160.6362350156. The cubic root of 25804 is about 29.5503306279.

It can be divided in two parts, 25 and 804, that multiplied together give a triangular number (20100 = T₂₀₀).

The spelling of 25804 in words is "twenty-five thousand, eight hundred four".