12421924 has 6 divisors (see below), whose sum is σ = 21738374. Its totient is φ = 6210960.

The previous prime is 12421921. The next prime is 12421933. The reversal of 12421924 is 42912421.

12421924 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 only one way, i.e., 11356900 + 1065024 = 3370^2 + 1032^2 .

It is not an unprimeable number, because it can be changed into a prime (12421921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1552737 + ... + 1552744.

Almost surely, 2^12421924 is an apocalyptic number.

It is an amenable number.

12421924 is a deficient number, since it is larger than the sum of its proper divisors (9316450).

12421924 is a wasteful number, since it uses less digits than its factorization.

12421924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105485 (or 3105483 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 12421924 is about 3524.4749963647. The cubic root of 12421924 is about 231.5952365626.

The spelling of 12421924 in words is "twelve million, four hundred twenty-one thousand, nine hundred twenty-four".