25256817 has 12 divisors (see below), whose sum is σ = 36922704. Its totient is φ = 16634520.

The previous prime is 25256809. The next prime is 25256821. The reversal of 25256817 is 71865252.

It is a happy number.

It is not a de Polignac number, because 25256817 - 2³ = 25256809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25256837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16159 + ... + 17652.

It is an arithmetic number, because the mean of its divisors is an integer number (3076892).

Almost surely, 2^25256817 is an apocalyptic number.

It is an amenable number.

25256817 is a deficient number, since it is larger than the sum of its proper divisors (11665887).

25256817 is a wasteful number, since it uses less digits than its factorization.

25256817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33900 (or 33897 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 25256817 is about 5025.6160816362. The cubic root of 25256817 is about 293.3996146994.

The spelling of 25256817 in words is "twenty-five million, two hundred fifty-six thousand, eight hundred seventeen".