42565169 has 2 divisors, whose sum is σ = 42565170. Its totient is φ = 42565168.

The previous prime is 42565163. The next prime is 42565177. The reversal of 42565169 is 96156524.

42565169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41731600 + 833569 = 6460^2 + 913^2 .

It is a cyclic number.

It is not a de Polignac number, because 42565169 - 2⁴ = 42565153 is a prime.

It is a super-2 number, since 2×42565169² = 3623587223997122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42565163) 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, 21282584 + 21282585.

It is an arithmetic number, because the mean of its divisors is an integer number (21282585).

Almost surely, 2^42565169 is an apocalyptic number.

It is an amenable number.

42565169 is a deficient number, since it is larger than the sum of its proper divisors (1).

42565169 is an equidigital number, since it uses as much as digits as its factorization.

42565169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The square root of 42565169 is about 6524.1987247477. The cubic root of 42565169 is about 349.1548834572.

The spelling of 42565169 in words is "forty-two million, five hundred sixty-five thousand, one hundred sixty-nine".