12564617 has 4 divisors (see below), whose sum is σ = 13531140. Its totient is φ = 11598096.

The previous prime is 12564613. The next prime is 12564631. The reversal of 12564617 is 71646521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5494336 + 7070281 = 2344^2 + 2659^2 .

It is a cyclic number.

It is not a de Polignac number, because 12564617 - 2² = 12564613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12564613) 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, 483242 + ... + 483267.

It is an arithmetic number, because the mean of its divisors is an integer number (3382785).

Almost surely, 2^12564617 is an apocalyptic number.

It is an amenable number.

12564617 is a deficient number, since it is larger than the sum of its proper divisors (966523).

12564617 is an equidigital number, since it uses as much as digits as its factorization.

12564617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966522.

The product of its digits is 10080, while the sum is 32.

The square root of 12564617 is about 3544.6603504426. The cubic root of 12564617 is about 232.4786553034.

The spelling of 12564617 in words is "twelve million, five hundred sixty-four thousand, six hundred seventeen".