12138575 has 6 divisors (see below), whose sum is σ = 15051864. Its totient is φ = 9710840.

The previous prime is 12138563. The next prime is 12138589. The reversal of 12138575 is 57583121.

It is not a de Polignac number, because 12138575 - 2¹⁰ = 12137551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 242747 + ... + 242796.

It is an arithmetic number, because the mean of its divisors is an integer number (2508644).

Almost surely, 2^12138575 is an apocalyptic number.

12138575 is a deficient number, since it is larger than the sum of its proper divisors (2913289).

12138575 is an equidigital number, since it uses as much as digits as its factorization.

12138575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485553 (or 485548 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 12138575 is about 3484.0457804110. The cubic root of 12138575 is about 229.8207488051.

The spelling of 12138575 in words is "twelve million, one hundred thirty-eight thousand, five hundred seventy-five".