12685909 has 8 divisors (see below), whose sum is σ = 12877920. Its totient is φ = 12495600.

The previous prime is 12685891. The next prime is 12685919. The reversal of 12685909 is 90958621.

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 12685909 - 2¹¹ = 12683861 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 (12685919) 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, 23179 + ... + 23719.

It is an arithmetic number, because the mean of its divisors is an integer number (1609740).

Almost surely, 2^12685909 is an apocalyptic number.

It is an amenable number.

12685909 is a deficient number, since it is larger than the sum of its proper divisors (192011).

12685909 is a wasteful number, since it uses less digits than its factorization.

12685909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 12685909 is about 3561.7283725742. The cubic root of 12685909 is about 233.2243352590.

The spelling of 12685909 in words is "twelve million, six hundred eighty-five thousand, nine hundred nine".