12158218 has 16 divisors (see below), whose sum is σ = 18561024. Its totient is φ = 5972400.

The previous prime is 12158203. The next prime is 12158219. The reversal of 12158218 is 81285121.

It is not an unprimeable number, because it can be changed into a prime (12158219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38196 + ... + 38512.

It is an arithmetic number, because the mean of its divisors is an integer number (1160064).

Almost surely, 2^12158218 is an apocalyptic number.

12158218 is a deficient number, since it is larger than the sum of its proper divisors (6402806).

12158218 is a wasteful number, since it uses less digits than its factorization.

12158218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597.

The product of its digits is 1280, while the sum is 28.

The square root of 12158218 is about 3486.8636336972. The cubic root of 12158218 is about 229.9446495667.

The spelling of 12158218 in words is "twelve million, one hundred fifty-eight thousand, two hundred eighteen".