12168539 has 4 divisors (see below), whose sum is σ = 12195624. Its totient is φ = 12141456.

The previous prime is 12168517. The next prime is 12168551. The reversal of 12168539 is 93586121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93586121 = 3137 ⋅29833.

It is a cyclic number.

It is not a de Polignac number, because 12168539 - 2⁸ = 12168283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12168499 and 12168508.

It is not an unprimeable number, because it can be changed into a prime (12168509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12857 + ... + 13770.

It is an arithmetic number, because the mean of its divisors is an integer number (3048906).

Almost surely, 2^12168539 is an apocalyptic number.

12168539 is a deficient number, since it is larger than the sum of its proper divisors (27085).

12168539 is an equidigital number, since it uses as much as digits as its factorization.

12168539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27084.

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

The square root of 12168539 is about 3488.3433030595. The cubic root of 12168539 is about 230.0096971337.

The spelling of 12168539 in words is "twelve million, one hundred sixty-eight thousand, five hundred thirty-nine".