12717217 has 8 divisors (see below), whose sum is σ = 12886272. Its totient is φ = 12549600.

The previous prime is 12717209. The next prime is 12717227. The reversal of 12717217 is 71271721.

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 12717217 - 2³ = 12717209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12717227) 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, 45117 + ... + 45397.

It is an arithmetic number, because the mean of its divisors is an integer number (1610784).

Almost surely, 2^12717217 is an apocalyptic number.

It is an amenable number.

12717217 is a deficient number, since it is larger than the sum of its proper divisors (169055).

12717217 is a wasteful number, since it uses less digits than its factorization.

12717217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719.

The product of its digits is 1372, while the sum is 28.

The square root of 12717217 is about 3566.1207214563. The cubic root of 12717217 is about 233.4160384821.

Adding to 12717217 its reverse (71271721), we get a palindrome (83988938).

The spelling of 12717217 in words is "twelve million, seven hundred seventeen thousand, two hundred seventeen".