25256128 has 28 divisors (see below), whose sum is σ = 50309272. Its totient is φ = 12579840.

The previous prime is 25256113. The next prime is 25256131. The reversal of 25256128 is 82165252.

It is a self number, because there is not a number n which added to its sum of digits gives 25256128.

It is an unprimeable number.

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, 20983 + ... + 22153.

Almost surely, 2^25256128 is an apocalyptic number.

It is an amenable number.

25256128 is a deficient number, since it is larger than the sum of its proper divisors (25053144).

25256128 is a wasteful number, since it uses less digits than its factorization.

25256128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520 (or 1510 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 25256128 is about 5025.5475323590. The cubic root of 25256128 is about 293.3969467178.

The spelling of 25256128 in words is "twenty-five million, two hundred fifty-six thousand, one hundred twenty-eight".