12135994 has 16 divisors (see below), whose sum is σ = 20758248. Its totient is φ = 5271552.

The previous prime is 12135979. The next prime is 12135997. The reversal of 12135994 is 49953121.

It can be written as a sum of positive squares in 4 ways, for example, as 6786025 + 5349969 = 2605^2 + 2313^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (12135997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13287 + ... + 14170.

Almost surely, 2^12135994 is an apocalyptic number.

12135994 is a deficient number, since it is larger than the sum of its proper divisors (8622254).

12135994 is a wasteful number, since it uses less digits than its factorization.

12135994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27489.

The product of its digits is 9720, while the sum is 34.

The square root of 12135994 is about 3483.6753580091. The cubic root of 12135994 is about 229.8044588810.

The spelling of 12135994 in words is "twelve million, one hundred thirty-five thousand, nine hundred ninety-four".