42016943 has 2 divisors, whose sum is σ = 42016944. Its totient is φ = 42016942.

The previous prime is 42016939. The next prime is 42016951. The reversal of 42016943 is 34961024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42016943 - 2² = 42016939 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42016913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21008471 + 21008472.

It is an arithmetic number, because the mean of its divisors is an integer number (21008472).

Almost surely, 2^42016943 is an apocalyptic number.

42016943 is a deficient number, since it is larger than the sum of its proper divisors (1).

42016943 is an equidigital number, since it uses as much as digits as its factorization.

42016943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 42016943 is about 6482.0477474329. The cubic root of 42016943 is about 347.6493997282.

Adding to 42016943 its reverse (34961024), we get a palindrome (76977967).

The spelling of 42016943 in words is "forty-two million, sixteen thousand, nine hundred forty-three".