12556544 has 144 divisors (see below), whose sum is σ = 34339200. Its totient is φ = 4515840.

The previous prime is 12556543. The next prime is 12556547. The reversal of 12556544 is 44565521.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 12556544.

It is not an unprimeable number, because it can be changed into a prime (12556543) 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 15 ways as a sum of consecutive naturals, for example, 965882 + ... + 965894.

Almost surely, 2^12556544 is an apocalyptic number.

12556544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12556544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17169600).

12556544 is an abundant number, since it is smaller than the sum of its proper divisors (21782656).

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

12556544 is an equidigital number, since it uses as much as digits as its factorization.

12556544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 33 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The square root of 12556544 is about 3543.5214123806. The cubic root of 12556544 is about 232.4288540165.

Multiplying 12556544 by its reverse (44565521), we get a square (559588925319424 = 23655632²).

The spelling of 12556544 in words is "twelve million, five hundred fifty-six thousand, five hundred forty-four".