12142439 has 2 divisors, whose sum is σ = 12142440. Its totient is φ = 12142438.

The previous prime is 12142433. The next prime is 12142451. The reversal of 12142439 is 93424121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12142439 - 2⁴ = 12142423 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12142433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6071219 + 6071220.

It is an arithmetic number, because the mean of its divisors is an integer number (6071220).

Almost surely, 2^12142439 is an apocalyptic number.

12142439 is a deficient number, since it is larger than the sum of its proper divisors (1).

12142439 is an equidigital number, since it uses as much as digits as its factorization.

12142439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 12142439 is about 3484.6002640188. The cubic root of 12142439 is about 229.8451320397.

The spelling of 12142439 in words is "twelve million, one hundred forty-two thousand, four hundred thirty-nine".