25631406 has 12 divisors (see below), whose sum is σ = 55534752. Its totient is φ = 8543796.

The previous prime is 25631387. The next prime is 25631443. The reversal of 25631406 is 60413652.

25631406 is a `hidden beast` number, since 25 + 631 + 4 + 0 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 25631406.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 711966 + ... + 712001.

It is an arithmetic number, because the mean of its divisors is an integer number (4627896).

Almost surely, 2^25631406 is an apocalyptic number.

25631406 is an abundant number, since it is smaller than the sum of its proper divisors (29903346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25631406 is a wasteful number, since it uses less digits than its factorization.

25631406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423975 (or 1423972 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 25631406 is about 5062.7468828690. The cubic root of 25631406 is about 294.8429921951.

It can be divided in two parts, 2563 and 1406, that added together give a square (3969 = 63²).

The spelling of 25631406 in words is "twenty-five million, six hundred thirty-one thousand, four hundred six".