12685 has 8 divisors (see below), whose sum is σ = 15840. Its totient is φ = 9744.

The previous prime is 12671. The next prime is 12689. The reversal of 12685 is 58621.

12685 = 31² + 32² + ... + 40².

It is a happy number.

12685 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 not a de Polignac number, because 12685 - 2⁵ = 12653 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186 + ... + 244.

It is an arithmetic number, because the mean of its divisors is an integer number (1980).

2¹²⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

12685 is a deficient number, since it is larger than the sum of its proper divisors (3155).

12685 is an equidigital number, since it uses as much as digits as its factorization.

12685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107.

The product of its digits is 480, while the sum is 22.

The square root of 12685 is about 112.6277052949. The cubic root of 12685 is about 23.3218764617.

The spelling of 12685 in words is "twelve thousand, six hundred eighty-five".