12165231 has 16 divisors (see below), whose sum is σ = 17711456. Its totient is φ = 7382016.

The previous prime is 12165221. The next prime is 12165277. The reversal of 12165231 is 13256121.

It is not a de Polignac number, because 12165231 - 2⁵ = 12165199 is a prime.

It is a super-2 number, since 2×12165231² = 295985690566722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12165198 and 12165207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12165221) 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 15 ways as a sum of consecutive naturals, for example, 711 + ... + 4983.

It is an arithmetic number, because the mean of its divisors is an integer number (1106966).

Almost surely, 2^12165231 is an apocalyptic number.

12165231 is a deficient number, since it is larger than the sum of its proper divisors (5546225).

12165231 is a wasteful number, since it uses less digits than its factorization.

12165231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362.

The product of its digits is 360, while the sum is 21.

The square root of 12165231 is about 3487.8691202509. The cubic root of 12165231 is about 229.9888526418.

The spelling of 12165231 in words is "twelve million, one hundred sixty-five thousand, two hundred thirty-one".