12135918 has 16 divisors (see below), whose sum is σ = 24864336. Its totient is φ = 3946560.

The previous prime is 12135913. The next prime is 12135931. The reversal of 12135918 is 81953121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135913) 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, 24421 + ... + 24912.

It is an arithmetic number, because the mean of its divisors is an integer number (1554021).

Almost surely, 2^12135918 is an apocalyptic number.

12135918 is an abundant number, since it is smaller than the sum of its proper divisors (12728418).

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

12135918 is a wasteful number, since it uses less digits than its factorization.

12135918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49379.

The product of its digits is 2160, while the sum is 30.

The square root of 12135918 is about 3483.6644499722. The cubic root of 12135918 is about 229.8039791737.

The spelling of 12135918 in words is "twelve million, one hundred thirty-five thousand, nine hundred eighteen".