12563631 has 12 divisors (see below), whose sum is σ = 18325008. Its totient is φ = 8293824.

The previous prime is 12563591. The next prime is 12563669. The reversal of 12563631 is 13636521.

12563631 is a `hidden beast` number, since 1 + 25 + 6 + 3 + 631 = 666.

It is not a de Polignac number, because 12563631 - 2⁶ = 12563567 is a prime.

It is a super-2 number, since 2×12563631² = 315689647808322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12563595 and 12563604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12564631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5850 + ... + 7703.

It is an arithmetic number, because the mean of its divisors is an integer number (1527084).

Almost surely, 2^12563631 is an apocalyptic number.

12563631 is a deficient number, since it is larger than the sum of its proper divisors (5761377).

12563631 is a wasteful number, since it uses less digits than its factorization.

12563631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13662 (or 13659 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 12563631 is about 3544.5212652769. The cubic root of 12563631 is about 232.4725739415.

The spelling of 12563631 in words is "twelve million, five hundred sixty-three thousand, six hundred thirty-one".