42007717 has 4 divisors (see below), whose sum is σ = 42025036. Its totient is φ = 41990400.

The previous prime is 42007673. The next prime is 42007723. The reversal of 42007717 is 71770024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41977441 + 30276 = 6479^2 + 174^2 .

It is a cyclic number.

It is not a de Polignac number, because 42007717 - 2²³ = 33619109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42007787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4284 + ... + 10117.

It is an arithmetic number, because the mean of its divisors is an integer number (10506259).

Almost surely, 2^42007717 is an apocalyptic number.

It is an amenable number.

42007717 is a deficient number, since it is larger than the sum of its proper divisors (17319).

42007717 is a wasteful number, since it uses less digits than its factorization.

42007717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17318.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 42007717 is about 6481.3360505377. The cubic root of 42007717 is about 347.6239524687.

It can be divided in two parts, 42007 and 717, that added together give a palindrome (42724).

The spelling of 42007717 in words is "forty-two million, seven thousand, seven hundred seventeen".