25556456 has 8 divisors (see below), whose sum is σ = 47918370. Its totient is φ = 12778224.

The previous prime is 25556437. The next prime is 25556459. The reversal of 25556456 is 65465552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13764100 + 11792356 = 3710^2 + 3434^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (25556459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1597271 + ... + 1597286.

Almost surely, 2^25556456 is an apocalyptic number.

It is an amenable number.

25556456 is a deficient number, since it is larger than the sum of its proper divisors (22361914).

25556456 is a wasteful number, since it uses less digits than its factorization.

25556456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194563 (or 3194559 counting only the distinct ones).

The product of its digits is 180000, while the sum is 38.

The square root of 25556456 is about 5055.3393555725. The cubic root of 25556456 is about 294.5553235298. Note that the first 3 decimals are identical.

The spelling of 25556456 in words is "twenty-five million, five hundred fifty-six thousand, four hundred fifty-six".