25456 has 20 divisors (see below), whose sum is σ = 51832. Its totient is φ = 12096.

The previous prime is 25453. The next prime is 25457. The reversal of 25456 is 65452.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25453) 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, 571 + ... + 613.

2²⁵⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

25456 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25916).

25456 is a wasteful number, since it uses less digits than its factorization.

25456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 82 counting only the distinct ones).

The product of its digits is 1200, while the sum is 22.

The square root of 25456 is about 159.5493654014. The cubic root of 25456 is about 29.4168875782.

The spelling of 25456 in words is "twenty-five thousand, four hundred fifty-six".