12856247 has 4 divisors (see below), whose sum is σ = 13169856. Its totient is φ = 12542640.

The previous prime is 12856237. The next prime is 12856253. The reversal of 12856247 is 74265821.

12856247 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12856247 - 2⁴ = 12856231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12856237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156743 + ... + 156824.

It is an arithmetic number, because the mean of its divisors is an integer number (3292464).

Almost surely, 2^12856247 is an apocalyptic number.

12856247 is a deficient number, since it is larger than the sum of its proper divisors (313609).

12856247 is an equidigital number, since it uses as much as digits as its factorization.

12856247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313608.

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

The square root of 12856247 is about 3585.5609045169. The cubic root of 12856247 is about 234.2635584449.

The spelling of 12856247 in words is "twelve million, eight hundred fifty-six thousand, two hundred forty-seven".