12421039 has 2 divisors, whose sum is σ = 12421040. Its totient is φ = 12421038.

The previous prime is 12421037. The next prime is 12421051. The reversal of 12421039 is 93012421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12421039 - 2¹ = 12421037 is a prime.

Together with 12421037, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12421037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210519 + 6210520.

It is an arithmetic number, because the mean of its divisors is an integer number (6210520).

Almost surely, 2^12421039 is an apocalyptic number.

12421039 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421039 is an equidigital number, since it uses as much as digits as its factorization.

12421039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12421039 is about 3524.3494435144. The cubic root of 12421039 is about 231.5897364310.

The spelling of 12421039 in words is "twelve million, four hundred twenty-one thousand, thirty-nine".