12556140 has 24 divisors (see below), whose sum is σ = 35157360. Its totient is φ = 3348288.

The previous prime is 12556139. The next prime is 12556153. The reversal of 12556140 is 4165521.

It is a self number, because there is not a number n which added to its sum of digits gives 12556140.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104575 + ... + 104694.

It is an arithmetic number, because the mean of its divisors is an integer number (1464890).

Almost surely, 2^12556140 is an apocalyptic number.

12556140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12556140 is an abundant number, since it is smaller than the sum of its proper divisors (22601220).

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

12556140 is a wasteful number, since it uses less digits than its factorization.

12556140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209281 (or 209279 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 12556140 is about 3543.4644064813. The cubic root of 12556140 is about 232.4263612323.

It can be divided in two parts, 125 and 56140, that added together give a palindrome (56265).

The spelling of 12556140 in words is "twelve million, five hundred fifty-six thousand, one hundred forty".