142421239 has 2 divisors, whose sum is σ = 142421240. Its totient is φ = 142421238.

The previous prime is 142421183. The next prime is 142421261. The reversal of 142421239 is 932124241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142421239 - 2²¹ = 140324087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142421299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71210619 + 71210620.

It is an arithmetic number, because the mean of its divisors is an integer number (71210620).

Almost surely, 2^142421239 is an apocalyptic number.

142421239 is a deficient number, since it is larger than the sum of its proper divisors (1).

142421239 is an equidigital number, since it uses as much as digits as its factorization.

142421239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 142421239 is about 11934.0369950826. The cubic root of 142421239 is about 522.2257150329.

The spelling of 142421239 in words is "one hundred forty-two million, four hundred twenty-one thousand, two hundred thirty-nine".