12138275 has 12 divisors (see below), whose sum is σ = 15101712. Its totient is φ = 9678240.

The previous prime is 12138263. The next prime is 12138277. The reversal of 12138275 is 57283121.

It is a de Polignac number, because none of the positive numbers 2^k-12138275 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12138277) 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 11 ways as a sum of consecutive naturals, for example, 9314 + ... + 10536.

It is an arithmetic number, because the mean of its divisors is an integer number (1258476).

Almost surely, 2^12138275 is an apocalyptic number.

12138275 is a deficient number, since it is larger than the sum of its proper divisors (2963437).

12138275 is a wasteful number, since it uses less digits than its factorization.

12138275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630 (or 1625 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 12138275 is about 3484.0027267498. The cubic root of 12138275 is about 229.8188554804.

The spelling of 12138275 in words is "twelve million, one hundred thirty-eight thousand, two hundred seventy-five".