25056891 has 16 divisors (see below), whose sum is σ = 37198720. Its totient is φ = 16669800.

The previous prime is 25056869. The next prime is 25056893. The reversal of 25056891 is 19865052.

It is a happy number.

25056891 is a `hidden beast` number, since 2 + 5 + 0 + 568 + 91 = 666.

It is not a de Polignac number, because 25056891 - 2⁵ = 25056859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25056893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23316 + ... + 24366.

It is an arithmetic number, because the mean of its divisors is an integer number (2324920).

Almost surely, 2^25056891 is an apocalyptic number.

25056891 is a deficient number, since it is larger than the sum of its proper divisors (12141829).

25056891 is a wasteful number, since it uses less digits than its factorization.

25056891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943 (or 1937 counting only the distinct ones).

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

The square root of 25056891 is about 5005.6858670915. The cubic root of 25056891 is about 292.6234061786.

The spelling of 25056891 in words is "twenty-five million, fifty-six thousand, eight hundred ninety-one".