12185979 has 16 divisors (see below), whose sum is σ = 17926944. Its totient is φ = 7315200.

The previous prime is 12185959. The next prime is 12185981. The reversal of 12185979 is 97958121.

It is not a de Polignac number, because 12185979 - 2¹¹ = 12183931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12185979.

It is not an unprimeable number, because it can be changed into a prime (12185959) 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, 2212 + ... + 5409.

It is an arithmetic number, because the mean of its divisors is an integer number (1120434).

Almost surely, 2^12185979 is an apocalyptic number.

12185979 is a deficient number, since it is larger than the sum of its proper divisors (5740965).

12185979 is a wasteful number, since it uses less digits than its factorization.

12185979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7678.

The product of its digits is 45360, while the sum is 42.

The square root of 12185979 is about 3490.8421620005. The cubic root of 12185979 is about 230.1195282940.

The spelling of 12185979 in words is "twelve million, one hundred eighty-five thousand, nine hundred seventy-nine".