12617217 has 24 divisors (see below), whose sum is σ = 19289088. Its totient is φ = 7934400.

The previous prime is 12617203. The next prime is 12617219. The reversal of 12617217 is 71271621.

It is not a de Polignac number, because 12617217 - 2⁴ = 12617201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12617219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10888 + ... + 11990.

It is an arithmetic number, because the mean of its divisors is an integer number (803712).

Almost surely, 2^12617217 is an apocalyptic number.

It is an amenable number.

12617217 is a deficient number, since it is larger than the sum of its proper divisors (6671871).

12617217 is a wasteful number, since it uses less digits than its factorization.

12617217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181 (or 1178 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 12617217 is about 3552.0722121038. The cubic root of 12617217 is about 232.8026167028.

Adding to 12617217 its reverse (71271621), we get a palindrome (83888838).

The spelling of 12617217 in words is "twelve million, six hundred seventeen thousand, two hundred seventeen".