42685117 has 4 divisors (see below), whose sum is σ = 42707196. Its totient is φ = 42663040.

The previous prime is 42685067. The next prime is 42685169. The reversal of 42685117 is 71158624.

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 25948836 + 16736281 = 5094^2 + 4091^2 .

It is a cyclic number.

It is not a de Polignac number, because 42685117 - 2⁷ = 42684989 is a prime.

It is a super-3 number, since 3×42685117³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42685417) 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, 7828 + ... + 12109.

It is an arithmetic number, because the mean of its divisors is an integer number (10676799).

Almost surely, 2^42685117 is an apocalyptic number.

It is an amenable number.

42685117 is a deficient number, since it is larger than the sum of its proper divisors (22079).

42685117 is a wasteful number, since it uses less digits than its factorization.

42685117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22078.

The product of its digits is 13440, while the sum is 34.

The square root of 42685117 is about 6533.3848042190. The cubic root of 42685117 is about 349.4825469197.

The spelling of 42685117 in words is "forty-two million, six hundred eighty-five thousand, one hundred seventeen".