12138135 has 32 divisors (see below), whose sum is σ = 20487168. Its totient is φ = 6124800.

The previous prime is 12138127. The next prime is 12138151. The reversal of 12138135 is 53183121.

It is not a de Polignac number, because 12138135 - 2³ = 12138127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51979 + ... + 52211.

It is an arithmetic number, because the mean of its divisors is an integer number (640224).

Almost surely, 2^12138135 is an apocalyptic number.

12138135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12138135 is a deficient number, since it is larger than the sum of its proper divisors (8349033).

12138135 is a wasteful number, since it uses less digits than its factorization.

12138135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415.

The product of its digits is 720, while the sum is 24.

The square root of 12138135 is about 3483.9826348591. The cubic root of 12138135 is about 229.8179719182.

The spelling of 12138135 in words is "twelve million, one hundred thirty-eight thousand, one hundred thirty-five".