12304021 has 2 divisors, whose sum is σ = 12304022. Its totient is φ = 12304020.

The previous prime is 12303997. The next prime is 12304027. The reversal of 12304021 is 12040321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10956100 + 1347921 = 3310^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 12304021 - 2¹⁷ = 12172949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12303992 and 12304010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12304027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6152010 + 6152011.

It is an arithmetic number, because the mean of its divisors is an integer number (6152011).

Almost surely, 2^12304021 is an apocalyptic number.

It is an amenable number.

12304021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12304021 is an equidigital number, since it uses as much as digits as its factorization.

12304021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12304021 is about 3507.7087963513. The cubic root of 12304021 is about 230.8601753712.

Adding to 12304021 its reverse (12040321), we get a palindrome (24344342).

The spelling of 12304021 in words is "twelve million, three hundred four thousand, twenty-one".