25981056 has 96 divisors (see below), whose sum is σ = 78764400. Its totient is φ = 8197632.

The previous prime is 25981051. The next prime is 25981057. The reversal of 25981056 is 65018952.

It is a happy number.

25981056 is a `hidden beast` number, since 2 + 598 + 10 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 25981056.

It is not an unprimeable number, because it can be changed into a prime (25981051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21295 + ... + 22481.

Almost surely, 2^25981056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25981056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39382200).

25981056 is an abundant number, since it is smaller than the sum of its proper divisors (52783344).

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

25981056 is a wasteful number, since it uses less digits than its factorization.

25981056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 25981056 is about 5097.1615630663. The cubic root of 25981056 is about 296.1776386851.

The spelling of 25981056 in words is "twenty-five million, nine hundred eighty-one thousand, fifty-six".