42805017 has 20 divisors (see below), whose sum is σ = 66009856. Its totient is φ = 27614520.

The previous prime is 42805003. The next prime is 42805019. The reversal of 42805017 is 71050824.

It is not a de Polignac number, because 42805017 - 2⁶ = 42804953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42805019) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6013 + ... + 11034.

Almost surely, 2^42805017 is an apocalyptic number.

It is an amenable number.

42805017 is a deficient number, since it is larger than the sum of its proper divisors (23204839).

42805017 is a wasteful number, since it uses less digits than its factorization.

42805017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17090 (or 17081 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 42805017 is about 6542.5543176958. The cubic root of 42805017 is about 349.8094663638.

The spelling of 42805017 in words is "forty-two million, eight hundred five thousand, seventeen".