25756 has 12 divisors (see below), whose sum is σ = 46368. Its totient is φ = 12512.

The previous prime is 25747. The next prime is 25759. The reversal of 25756 is 65752.

It is a happy number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 25756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25759) 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, 120 + ... + 256.

It is an arithmetic number, because the mean of its divisors is an integer number (3864).

2²⁵⁷⁵⁶ is an apocalyptic number.

25756 is the 102-nd centered pentagonal number.

It is an amenable number.

25756 is a deficient number, since it is larger than the sum of its proper divisors (20612).

25756 is a wasteful number, since it uses less digits than its factorization.

25756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 186 counting only the distinct ones).

The product of its digits is 2100, while the sum is 25.

The square root of 25756 is about 160.4867595785. The cubic root of 25756 is about 29.5319963092.

It can be divided in two parts, 257 and 56, that added together give a palindrome (313).

The spelling of 25756 in words is "twenty-five thousand, seven hundred fifty-six".