42885943 has 2 divisors, whose sum is σ = 42885944. Its totient is φ = 42885942.

The previous prime is 42885937. The next prime is 42886001. The reversal of 42885943 is 34958824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42885943 - 2⁵ = 42885911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42885943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42885343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21442971 + 21442972.

It is an arithmetic number, because the mean of its divisors is an integer number (21442972).

Almost surely, 2^42885943 is an apocalyptic number.

42885943 is a deficient number, since it is larger than the sum of its proper divisors (1).

42885943 is an equidigital number, since it uses as much as digits as its factorization.

42885943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 43.

The square root of 42885943 is about 6548.7359849058. The cubic root of 42885943 is about 350.0297743378.

The spelling of 42885943 in words is "forty-two million, eight hundred eighty-five thousand, nine hundred forty-three".