42804239 has 2 divisors, whose sum is σ = 42804240. Its totient is φ = 42804238.

The previous prime is 42804233. The next prime is 42804247. The reversal of 42804239 is 93240824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42804239 - 2²⁰ = 41755663 is a 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 (42804233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21402119 + 21402120.

It is an arithmetic number, because the mean of its divisors is an integer number (21402120).

Almost surely, 2^42804239 is an apocalyptic number.

42804239 is a deficient number, since it is larger than the sum of its proper divisors (1).

42804239 is an equidigital number, since it uses as much as digits as its factorization.

42804239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 42804239 is about 6542.4948605253. The cubic root of 42804239 is about 349.8073470374.

The spelling of 42804239 in words is "forty-two million, eight hundred four thousand, two hundred thirty-nine".