25631985 has 8 divisors (see below), whose sum is σ = 41011200. Its totient is φ = 13670384.

The previous prime is 25631941. The next prime is 25632041. The reversal of 25631985 is 58913652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25631985 - 2⁷ = 25631857 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854385 + ... + 854414.

It is an arithmetic number, because the mean of its divisors is an integer number (5126400).

Almost surely, 2^25631985 is an apocalyptic number.

It is an amenable number.

25631985 is a deficient number, since it is larger than the sum of its proper divisors (15379215).

25631985 is a wasteful number, since it uses less digits than its factorization.

25631985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708807.

The product of its digits is 64800, while the sum is 39.

The square root of 25631985 is about 5062.8040649427. The cubic root of 25631985 is about 294.8452122945.

The spelling of 25631985 in words is "twenty-five million, six hundred thirty-one thousand, nine hundred eighty-five".