42117169 has 2 divisors, whose sum is σ = 42117170. Its totient is φ = 42117168.

The previous prime is 42117161. The next prime is 42117181. The reversal of 42117169 is 96171124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25200400 + 16916769 = 5020^2 + 4113^2 .

It is a cyclic number.

It is not a de Polignac number, because 42117169 - 2³ = 42117161 is a prime.

It is a super-2 number, since 2×42117169² = 3547711849149122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42117169.

It is not a weakly prime, because it can be changed into another prime (42117161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21058584 + 21058585.

It is an arithmetic number, because the mean of its divisors is an integer number (21058585).

Almost surely, 2^42117169 is an apocalyptic number.

It is an amenable number.

42117169 is a deficient number, since it is larger than the sum of its proper divisors (1).

42117169 is an equidigital number, since it uses as much as digits as its factorization.

42117169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The square root of 42117169 is about 6489.7741871347. The cubic root of 42117169 is about 347.9256045003.

The spelling of 42117169 in words is "forty-two million, one hundred seventeen thousand, one hundred sixty-nine".