12217672 has 24 divisors (see below), whose sum is σ = 23589090. Its totient is φ = 5928960.

The previous prime is 12217657. The next prime is 12217693. The reversal of 12217672 is 27671221.

12217672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 4186116 + 8031556 = 2046^2 + 2834^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12217672.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63208 + ... + 63400.

Almost surely, 2^12217672 is an apocalyptic number.

It is an amenable number.

12217672 is a deficient number, since it is larger than the sum of its proper divisors (11371418).

12217672 is an equidigital number, since it uses as much as digits as its factorization.

12217672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 236 counting only the distinct ones).

The product of its digits is 2352, while the sum is 28.

The square root of 12217672 is about 3495.3786633210. The cubic root of 12217672 is about 230.3188520329.

Adding to 12217672 its reverse (27671221), we get a palindrome (39888893).

The spelling of 12217672 in words is "twelve million, two hundred seventeen thousand, six hundred seventy-two".