12555940 has 12 divisors (see below), whose sum is σ = 26367516. Its totient is φ = 5022368.

The previous prime is 12555931. The next prime is 12555947. The reversal of 12555940 is 4955521.

It can be written as a sum of positive squares in 2 ways, for example, as 9437184 + 3118756 = 3072^2 + 1766^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12555947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313879 + ... + 313918.

It is an arithmetic number, because the mean of its divisors is an integer number (2197293).

Almost surely, 2^12555940 is an apocalyptic number.

12555940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12555940 is an abundant number, since it is smaller than the sum of its proper divisors (13811576).

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

12555940 is a wasteful number, since it uses less digits than its factorization.

12555940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627806 (or 627804 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 12555940 is about 3543.4361853997. The cubic root of 12555940 is about 232.4251271609.

It can be divided in two parts, 125 and 55940, that added together give a palindrome (56065).

The spelling of 12555940 in words is "twelve million, five hundred fifty-five thousand, nine hundred forty".