12979140 has 24 divisors (see below), whose sum is σ = 36341760. Its totient is φ = 3461088.

The previous prime is 12979139. The next prime is 12979151. The reversal of 12979140 is 4197921.

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, 108100 + ... + 108219.

It is an arithmetic number, because the mean of its divisors is an integer number (1514240).

Almost surely, 2^12979140 is an apocalyptic number.

12979140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12979140 is an abundant number, since it is smaller than the sum of its proper divisors (23362620).

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

12979140 is a wasteful number, since it uses less digits than its factorization.

12979140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216331 (or 216329 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 12979140 is about 3602.6573525663. The cubic root of 12979140 is about 235.0076351827.

The spelling of 12979140 in words is "twelve million, nine hundred seventy-nine thousand, one hundred forty".