12685247 has 4 divisors (see below), whose sum is σ = 13431456. Its totient is φ = 11939040.

The previous prime is 12685229. The next prime is 12685249. The reversal of 12685247 is 74258621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74258621 = 2731 ⋅27191.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12685247 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 (12685249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373079 + ... + 373112.

It is an arithmetic number, because the mean of its divisors is an integer number (3357864).

Almost surely, 2^12685247 is an apocalyptic number.

12685247 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12685247 is a deficient number, since it is larger than the sum of its proper divisors (746209).

12685247 is an equidigital number, since it uses as much as digits as its factorization.

12685247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746208.

The product of its digits is 26880, while the sum is 35.

The square root of 12685247 is about 3561.6354389522. The cubic root of 12685247 is about 233.2202783379.

The spelling of 12685247 in words is "twelve million, six hundred eighty-five thousand, two hundred forty-seven".