12168687 has 4 divisors (see below), whose sum is σ = 16224920. Its totient is φ = 8112456.

The previous prime is 12168643. The next prime is 12168697. The reversal of 12168687 is 78686121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78686121 = 3 ⋅26228707.

It is not a de Polignac number, because 12168687 - 2¹⁰ = 12167663 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 (12168697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2028112 + ... + 2028117.

It is an arithmetic number, because the mean of its divisors is an integer number (4056230).

Almost surely, 2^12168687 is an apocalyptic number.

12168687 is a deficient number, since it is larger than the sum of its proper divisors (4056233).

12168687 is an equidigital number, since it uses as much as digits as its factorization.

12168687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056232.

The product of its digits is 32256, while the sum is 39.

The square root of 12168687 is about 3488.3645165034. The cubic root of 12168687 is about 230.0106296285.

The spelling of 12168687 in words is "twelve million, one hundred sixty-eight thousand, six hundred eighty-seven".