12217597 has 4 divisors (see below), whose sum is σ = 13962976. Its totient is φ = 10472220.

The previous prime is 12217591. The next prime is 12217607. The reversal of 12217597 is 79571221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12217597 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 (12217591) 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, 872679 + ... + 872692.

It is an arithmetic number, because the mean of its divisors is an integer number (3490744).

Almost surely, 2^12217597 is an apocalyptic number.

It is an amenable number.

12217597 is a deficient number, since it is larger than the sum of its proper divisors (1745379).

12217597 is an equidigital number, since it uses as much as digits as its factorization.

12217597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745378.

The product of its digits is 8820, while the sum is 34.

The square root of 12217597 is about 3495.3679348532. The cubic root of 12217597 is about 230.3183807497.

The spelling of 12217597 in words is "twelve million, two hundred seventeen thousand, five hundred ninety-seven".