12685939 has 8 divisors (see below), whose sum is σ = 15261440. Its totient is φ = 10301256.

The previous prime is 12685919. The next prime is 12685943. The reversal of 12685939 is 93958621.

It is a happy number.

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

It is not a de Polignac number, because 12685939 - 2⁹ = 12685427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12685895 and 12685904.

It is not an unprimeable number, because it can be changed into a prime (12685919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47559 + ... + 47824.

It is an arithmetic number, because the mean of its divisors is an integer number (1907680).

Almost surely, 2^12685939 is an apocalyptic number.

12685939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12685939 is a deficient number, since it is larger than the sum of its proper divisors (2575501).

12685939 is an equidigital number, since it uses as much as digits as its factorization.

12685939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95409.

The product of its digits is 116640, while the sum is 43.

The square root of 12685939 is about 3561.7325840102. The cubic root of 12685939 is about 233.2245191040.

The spelling of 12685939 in words is "twelve million, six hundred eighty-five thousand, nine hundred thirty-nine".