12768647 has 4 divisors (see below), whose sum is σ = 12812520. Its totient is φ = 12724776.

The previous prime is 12768641. The next prime is 12768667. The reversal of 12768647 is 74686721.

12768647 is digitally balanced in base 2, 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 12768647 - 2⁶ = 12768583 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 (12768641) 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, 21497 + ... + 22082.

It is an arithmetic number, because the mean of its divisors is an integer number (3203130).

Almost surely, 2^12768647 is an apocalyptic number.

12768647 is a deficient number, since it is larger than the sum of its proper divisors (43873).

12768647 is an equidigital number, since it uses as much as digits as its factorization.

12768647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43872.

The product of its digits is 112896, while the sum is 41.

The square root of 12768647 is about 3573.3243625509. The cubic root of 12768647 is about 233.7302697179.

The spelling of 12768647 in words is "twelve million, seven hundred sixty-eight thousand, six hundred forty-seven".