25582 has 4 divisors (see below), whose sum is σ = 38376. Its totient is φ = 12790.

The previous prime is 25579. The next prime is 25583. The reversal of 25582 is 28552.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394 + ... + 6397.

It is an arithmetic number, because the mean of its divisors is an integer number (9594).

2²⁵⁵⁸² is an apocalyptic number.

25582 is a deficient number, since it is larger than the sum of its proper divisors (12794).

25582 is a wasteful number, since it uses less digits than its factorization.

25582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12793.

The product of its digits is 800, while the sum is 22.

The square root of 25582 is about 159.9437401088. The cubic root of 25582 is about 29.4653428105.

It can be divided in two parts, 255 and 82, that multiplied together give a triangular number (20910 = T₂₀₄).

The spelling of 25582 in words is "twenty-five thousand, five hundred eighty-two".