12512940 has 48 divisors (see below), whose sum is σ = 38223360. Its totient is φ = 3033280.

The previous prime is 12512939. The next prime is 12512947. The reversal of 12512940 is 4921521.

It is a self number, because there is not a number n which added to its sum of digits gives 12512940.

It is not an unprimeable number, because it can be changed into a prime (12512947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8820 + ... + 10139.

It is an arithmetic number, because the mean of its divisors is an integer number (796320).

Almost surely, 2^12512940 is an apocalyptic number.

12512940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12512940 is an abundant number, since it is smaller than the sum of its proper divisors (25710420).

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

12512940 is a wasteful number, since it uses less digits than its factorization.

12512940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18982 (or 18980 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 12512940 is about 3537.3634249254. The cubic root of 12512940 is about 232.1594969419.

The spelling of 12512940 in words is "twelve million, five hundred twelve thousand, nine hundred forty".