12775647 has 8 divisors (see below), whose sum is σ = 17121456. Its totient is φ = 8473472.

The previous prime is 12775639. The next prime is 12775663. The reversal of 12775647 is 74657721.

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 12775647 - 2³ = 12775639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12775547) 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, 10218 + ... + 11399.

It is an arithmetic number, because the mean of its divisors is an integer number (2140182).

Almost surely, 2^12775647 is an apocalyptic number.

12775647 is a deficient number, since it is larger than the sum of its proper divisors (4345809).

12775647 is a wasteful number, since it uses less digits than its factorization.

12775647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21817.

The product of its digits is 82320, while the sum is 39.

The square root of 12775647 is about 3574.3037084165. The cubic root of 12775647 is about 233.7729736159.

The spelling of 12775647 in words is "twelve million, seven hundred seventy-five thousand, six hundred forty-seven".