12165389 has 4 divisors (see below), whose sum is σ = 12185724. Its totient is φ = 12145056.

The previous prime is 12165383. The next prime is 12165401. The reversal of 12165389 is 98356121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98356121 = 2027 ⋅48523.

It can be written as a sum of positive squares in 2 ways, for example, as 537289 + 11628100 = 733^2 + 3410^2 .

It is a cyclic number.

It is not a de Polignac number, because 12165389 - 2⁸ = 12165133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12165383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9242 + ... + 10475.

It is an arithmetic number, because the mean of its divisors is an integer number (3046431).

Almost surely, 2^12165389 is an apocalyptic number.

It is an amenable number.

12165389 is a deficient number, since it is larger than the sum of its proper divisors (20335).

12165389 is an equidigital number, since it uses as much as digits as its factorization.

12165389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20334.

The product of its digits is 12960, while the sum is 35.

The square root of 12165389 is about 3487.8917701098. The cubic root of 12165389 is about 229.9898483232.

The spelling of 12165389 in words is "twelve million, one hundred sixty-five thousand, three hundred eighty-nine".