42885517 has 4 divisors (see below), whose sum is σ = 43073020. Its totient is φ = 42698016.

The previous prime is 42885511. The next prime is 42885523. The reversal of 42885517 is 71558824.

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

It is an interprime number because it is at equal distance from previous prime (42885511) and next prime (42885523).

It can be written as a sum of positive squares in 2 ways, for example, as 18224361 + 24661156 = 4269^2 + 4966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42885517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42885517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42885511) 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, 93408 + ... + 93865.

It is an arithmetic number, because the mean of its divisors is an integer number (10768255).

Almost surely, 2^42885517 is an apocalyptic number.

It is an amenable number.

42885517 is a deficient number, since it is larger than the sum of its proper divisors (187503).

42885517 is a wasteful number, since it uses less digits than its factorization.

42885517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187502.

The product of its digits is 89600, while the sum is 40.

The square root of 42885517 is about 6548.7034594643. The cubic root of 42885517 is about 350.0286153475.

The spelling of 42885517 in words is "forty-two million, eight hundred eighty-five thousand, five hundred seventeen".