12135915 has 24 divisors (see below), whose sum is σ = 22948848. Its totient is φ = 5883840.

The previous prime is 12135913. The next prime is 12135931. The reversal of 12135915 is 51953121.

It is not a de Polignac number, because 12135915 - 2¹ = 12135913 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 11764 + ... + 12753.

It is an arithmetic number, because the mean of its divisors is an integer number (956202).

Almost surely, 2^12135915 is an apocalyptic number.

12135915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12135915 is a deficient number, since it is larger than the sum of its proper divisors (10812933).

12135915 is a wasteful number, since it uses less digits than its factorization.

12135915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24539 (or 24536 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 12135915 is about 3483.6640193911. The cubic root of 12135915 is about 229.8039602378.

The spelling of 12135915 in words is "twelve million, one hundred thirty-five thousand, nine hundred fifteen".