42105863 has 2 divisors, whose sum is σ = 42105864. Its totient is φ = 42105862.

The previous prime is 42105851. The next prime is 42105887. The reversal of 42105863 is 36850124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42105863 - 2⁸ = 42105607 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 (42105263) 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, 21052931 + 21052932.

It is an arithmetic number, because the mean of its divisors is an integer number (21052932).

Almost surely, 2^42105863 is an apocalyptic number.

42105863 is a deficient number, since it is larger than the sum of its proper divisors (1).

42105863 is an equidigital number, since it uses as much as digits as its factorization.

42105863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 42105863 is about 6488.9030660043. The cubic root of 42105863 is about 347.8944691461.

Adding to 42105863 its reverse (36850124), we get a palindrome (78955987).

The spelling of 42105863 in words is "forty-two million, one hundred five thousand, eight hundred sixty-three".