42105179 has 2 divisors, whose sum is σ = 42105180. Its totient is φ = 42105178.

The previous prime is 42105143. The next prime is 42105181. The reversal of 42105179 is 97150124.

42105179 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42105179 is a prime.

It is a Sophie Germain prime.

Together with 42105181, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42105109) 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, 21052589 + 21052590.

It is an arithmetic number, because the mean of its divisors is an integer number (21052590).

Almost surely, 2^42105179 is an apocalyptic number.

42105179 is a deficient number, since it is larger than the sum of its proper divisors (1).

42105179 is an equidigital number, since it uses as much as digits as its factorization.

42105179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 42105179 is about 6488.8503604260. The cubic root of 42105179 is about 347.8925853142.

The spelling of 42105179 in words is "forty-two million, one hundred five thousand, one hundred seventy-nine".