12168665 has 4 divisors (see below), whose sum is σ = 14602404. Its totient is φ = 9734928.

The previous prime is 12168643. The next prime is 12168697. The reversal of 12168665 is 56686121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56686121 = 97 ⋅584393.

It can be written as a sum of positive squares in 2 ways, for example, as 6697744 + 5470921 = 2588^2 + 2339^2 .

It is a cyclic number.

It is not a de Polignac number, because 12168665 - 2¹⁰ = 12167641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1216862 + ... + 1216871.

It is an arithmetic number, because the mean of its divisors is an integer number (3650601).

Almost surely, 2^12168665 is an apocalyptic number.

It is an amenable number.

12168665 is a deficient number, since it is larger than the sum of its proper divisors (2433739).

12168665 is an equidigital number, since it uses as much as digits as its factorization.

12168665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433738.

The product of its digits is 17280, while the sum is 35.

The square root of 12168665 is about 3488.3613631618. The cubic root of 12168665 is about 230.0104910148.

It can be divided in two parts, 121 and 68665, that added together give a palindrome (68786).

The spelling of 12168665 in words is "twelve million, one hundred sixty-eight thousand, six hundred sixty-five".