12813556 has 24 divisors (see below), whose sum is σ = 25711616. Its totient is φ = 5473440.

The previous prime is 12813523. The next prime is 12813557. The reversal of 12813556 is 65531821.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12813557) 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 7 ways as a sum of consecutive naturals, for example, 11245 + ... + 12331.

Almost surely, 2^12813556 is an apocalyptic number.

It is an amenable number.

12813556 is an abundant number, since it is smaller than the sum of its proper divisors (12898060).

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

12813556 is a wasteful number, since it uses less digits than its factorization.

12813556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519 (or 1517 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 12813556 is about 3579.6027712583. The cubic root of 12813556 is about 234.0039690563.

The spelling of 12813556 in words is "twelve million, eight hundred thirteen thousand, five hundred fifty-six".