12217748 has 6 divisors (see below), whose sum is σ = 21381066. Its totient is φ = 6108872.

The previous prime is 12217717. The next prime is 12217753. The reversal of 12217748 is 84771221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7941124 + 4276624 = 2818^2 + 2068^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1527215 + ... + 1527222.

It is an arithmetic number, because the mean of its divisors is an integer number (3563511).

Almost surely, 2^12217748 is an apocalyptic number.

It is an amenable number.

12217748 is a deficient number, since it is larger than the sum of its proper divisors (9163318).

12217748 is a wasteful number, since it uses less digits than its factorization.

12217748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054441 (or 3054439 counting only the distinct ones).

The product of its digits is 6272, while the sum is 32.

The square root of 12217748 is about 3495.3895348015. The cubic root of 12217748 is about 230.3193295978.

Adding to 12217748 its reverse (84771221), we get a palindrome (96988969).

The spelling of 12217748 in words is "twelve million, two hundred seventeen thousand, seven hundred forty-eight".