442042291 has 2 divisors, whose sum is σ = 442042292. Its totient is φ = 442042290.

The previous prime is 442042283. The next prime is 442042301. The reversal of 442042291 is 192240244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442042291 - 2³ = 442042283 is a prime.

It is not a weakly prime, because it can be changed into another prime (442042231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221021145 + 221021146.

It is an arithmetic number, because the mean of its divisors is an integer number (221021146).

Almost surely, 2^442042291 is an apocalyptic number.

442042291 is a deficient number, since it is larger than the sum of its proper divisors (1).

442042291 is an equidigital number, since it uses as much as digits as its factorization.

442042291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 442042291 is about 21024.8018064380. The cubic root of 442042291 is about 761.7654542520.

The spelling of 442042291 in words is "four hundred forty-two million, forty-two thousand, two hundred ninety-one".