42138163 has 2 divisors, whose sum is σ = 42138164. Its totient is φ = 42138162.

The previous prime is 42138157. The next prime is 42138191. The reversal of 42138163 is 36183124.

42138163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (42138191) can be obtained adding 42138163 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42138163 is a prime.

It is not a weakly prime, because it can be changed into another prime (42138113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21069081 + 21069082.

It is an arithmetic number, because the mean of its divisors is an integer number (21069082).

Almost surely, 2^42138163 is an apocalyptic number.

42138163 is a deficient number, since it is larger than the sum of its proper divisors (1).

42138163 is an equidigital number, since it uses as much as digits as its factorization.

42138163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 42138163 is about 6491.3914533018. The cubic root of 42138163 is about 347.9834046563.

The spelling of 42138163 in words is "forty-two million, one hundred thirty-eight thousand, one hundred sixty-three".