42170539 has 2 divisors, whose sum is σ = 42170540. Its totient is φ = 42170538.

The previous prime is 42170533. The next prime is 42170543. The reversal of 42170539 is 93507124.

42170539 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 not a de Polignac number, because 42170539 - 2⁵ = 42170507 is a prime.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 42170539.

It is not a weakly prime, because it can be changed into another prime (42170533) 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, 21085269 + 21085270.

It is an arithmetic number, because the mean of its divisors is an integer number (21085270).

Almost surely, 2^42170539 is an apocalyptic number.

42170539 is a deficient number, since it is larger than the sum of its proper divisors (1).

42170539 is an equidigital number, since it uses as much as digits as its factorization.

42170539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 42170539 is about 6493.8847387369. The cubic root of 42170539 is about 348.0725038301.

The spelling of 42170539 in words is "forty-two million, one hundred seventy thousand, five hundred thirty-nine".