12556422 has 12 divisors (see below), whose sum is σ = 27205620. Its totient is φ = 4185468.

The previous prime is 12556417. The next prime is 12556429. The reversal of 12556422 is 22465521.

12556422 is a `hidden beast` number, since 12 + 5 + 5 + 642 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556429) by changing a digit.

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, 348772 + ... + 348807.

It is an arithmetic number, because the mean of its divisors is an integer number (2267135).

Almost surely, 2^12556422 is an apocalyptic number.

12556422 is an abundant number, since it is smaller than the sum of its proper divisors (14649198).

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

12556422 is a wasteful number, since it uses less digits than its factorization.

12556422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697587 (or 697584 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 12556422 is about 3543.5041978245. The cubic root of 12556422 is about 232.4281012507.

Subtracting 12556422 from its reverse (22465521), we obtain a palindrome (9909099).

The spelling of 12556422 in words is "twelve million, five hundred fifty-six thousand, four hundred twenty-two".