12685687 has 8 divisors (see below), whose sum is σ = 14851872. Its totient is φ = 10608000.

The previous prime is 12685681. The next prime is 12685733. The reversal of 12685687 is 78658621.

12685687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12685687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12685681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21814 + ... + 22387.

It is an arithmetic number, because the mean of its divisors is an integer number (1856484).

Almost surely, 2^12685687 is an apocalyptic number.

12685687 is a deficient number, since it is larger than the sum of its proper divisors (2166185).

12685687 is an equidigital number, since it uses as much as digits as its factorization.

12685687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44249.

The product of its digits is 161280, while the sum is 43.

The square root of 12685687 is about 3561.6972077929. The cubic root of 12685687 is about 233.2229747966. Note that the first 3 decimals are identical.

The spelling of 12685687 in words is "twelve million, six hundred eighty-five thousand, six hundred eighty-seven".