42318717 has 8 divisors (see below), whose sum is σ = 64485696. Its totient is φ = 24182112.

The previous prime is 42318709. The next prime is 42318721. The reversal of 42318717 is 71781324.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42318717 - 2³ = 42318709 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42318707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1007568 + ... + 1007609.

It is an arithmetic number, because the mean of its divisors is an integer number (8060712).

Almost surely, 2^42318717 is an apocalyptic number.

It is an amenable number.

42318717 is a deficient number, since it is larger than the sum of its proper divisors (22166979).

42318717 is a wasteful number, since it uses less digits than its factorization.

42318717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015187.

The product of its digits is 9408, while the sum is 33.

The square root of 42318717 is about 6505.2837755166. The cubic root of 42318717 is about 348.4797106671.

The spelling of 42318717 in words is "forty-two million, three hundred eighteen thousand, seven hundred seventeen".