12645647 has 16 divisors (see below), whose sum is σ = 14949120. Its totient is φ = 10473408.

The previous prime is 12645643. The next prime is 12645649. The reversal of 12645647 is 74654621.

12645647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12645647 - 2² = 12645643 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 (12645643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27443 + ... + 27899.

It is an arithmetic number, because the mean of its divisors is an integer number (934320).

Almost surely, 2^12645647 is an apocalyptic number.

12645647 is a deficient number, since it is larger than the sum of its proper divisors (2303473).

12645647 is an equidigital number, since it uses as much as digits as its factorization.

12645647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590.

The product of its digits is 40320, while the sum is 35.

The square root of 12645647 is about 3556.0718496678. The cubic root of 12645647 is about 232.9773412731.

The spelling of 12645647 in words is "twelve million, six hundred forty-five thousand, six hundred forty-seven".