12042439 has 2 divisors, whose sum is σ = 12042440. Its totient is φ = 12042438.

The previous prime is 12042421. The next prime is 12042449. The reversal of 12042439 is 93424021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12042439 - 2⁷ = 12042311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12042419) by changing a digit.

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, 6021219 + 6021220.

It is an arithmetic number, because the mean of its divisors is an integer number (6021220).

Almost surely, 2^12042439 is an apocalyptic number.

12042439 is a deficient number, since it is larger than the sum of its proper divisors (1).

12042439 is an equidigital number, since it uses as much as digits as its factorization.

12042439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 12042439 is about 3470.2217508396. The cubic root of 12042439 is about 229.2124227901.

The spelling of 12042439 in words is "twelve million, forty-two thousand, four hundred thirty-nine".