42342239 has 2 divisors, whose sum is σ = 42342240. Its totient is φ = 42342238.

The previous prime is 42342221. The next prime is 42342247. The reversal of 42342239 is 93224324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42342239 - 2⁸ = 42341983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42342439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21171119 + 21171120.

It is an arithmetic number, because the mean of its divisors is an integer number (21171120).

Almost surely, 2^42342239 is an apocalyptic number.

42342239 is a deficient number, since it is larger than the sum of its proper divisors (1).

42342239 is an equidigital number, since it uses as much as digits as its factorization.

42342239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

The square root of 42342239 is about 6507.0914393452. The cubic root of 42342239 is about 348.5442638334.

The spelling of 42342239 in words is "forty-two million, three hundred forty-two thousand, two hundred thirty-nine".