12421568 has 14 divisors (see below), whose sum is σ = 24649176. Its totient is φ = 6210752.

The previous prime is 12421567. The next prime is 12421579. The reversal of 12421568 is 86512421.

It is a self number, because there is not a number n which added to its sum of digits gives 12421568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96980 + ... + 97107.

Almost surely, 2^12421568 is an apocalyptic number.

It is an amenable number.

12421568 is a deficient number, since it is larger than the sum of its proper divisors (12227608).

12421568 is an equidigital number, since it uses as much as digits as its factorization.

12421568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194099 (or 194089 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 12421568 is about 3524.4244920270. The cubic root of 12421568 is about 231.5930241117.

Adding to 12421568 its reverse (86512421), we get a palindrome (98933989).

The spelling of 12421568 in words is "twelve million, four hundred twenty-one thousand, five hundred sixty-eight".