12647217 has 32 divisors (see below), whose sum is σ = 20229120. Its totient is φ = 6937920.

The previous prime is 12647213. The next prime is 12647221. The reversal of 12647217 is 71274621.

12647217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12647213) and next prime (12647221).

It is not a de Polignac number, because 12647217 - 2² = 12647213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12647213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13983 + ... + 14859.

It is an arithmetic number, because the mean of its divisors is an integer number (632160).

Almost surely, 2^12647217 is an apocalyptic number.

It is an amenable number.

12647217 is a deficient number, since it is larger than the sum of its proper divisors (7581903).

12647217 is a wasteful number, since it uses less digits than its factorization.

12647217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933.

The product of its digits is 4704, while the sum is 30.

The square root of 12647217 is about 3556.2925920121. The cubic root of 12647217 is about 232.9869825167.

The spelling of 12647217 in words is "twelve million, six hundred forty-seven thousand, two hundred seventeen".