442542043 has 2 divisors, whose sum is σ = 442542044. Its totient is φ = 442542042.

The previous prime is 442542031. The next prime is 442542073. The reversal of 442542043 is 340245244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442542043 - 2⁹ = 442541531 is a prime.

It is a super-2 number, since 2×442542043² = 391686919645227698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442542073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221271021 + 221271022.

It is an arithmetic number, because the mean of its divisors is an integer number (221271022).

Almost surely, 2^442542043 is an apocalyptic number.

442542043 is a deficient number, since it is larger than the sum of its proper divisors (1).

442542043 is an equidigital number, since it uses as much as digits as its factorization.

442542043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 442542043 is about 21036.6832699454. The cubic root of 442542043 is about 762.0524180730.

Adding to 442542043 its reverse (340245244), we get a palindrome (782787287).

The spelling of 442542043 in words is "four hundred forty-two million, five hundred forty-two thousand, forty-three".