42407117 has 4 divisors (see below), whose sum is σ = 42716796. Its totient is φ = 42097440.

The previous prime is 42407111. The next prime is 42407119. The reversal of 42407117 is 71170424.

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 19616041 + 22791076 = 4429^2 + 4774^2 .

It is a cyclic number.

It is not a de Polignac number, because 42407117 - 2¹⁰ = 42406093 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 (42407111) 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, 154634 + ... + 154907.

It is an arithmetic number, because the mean of its divisors is an integer number (10679199).

Almost surely, 2^42407117 is an apocalyptic number.

It is an amenable number.

42407117 is a deficient number, since it is larger than the sum of its proper divisors (309679).

42407117 is a wasteful number, since it uses less digits than its factorization.

42407117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309678.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 42407117 is about 6512.0747078024. The cubic root of 42407117 is about 348.7221895151.

It can be divided in two parts, 42407 and 117, that added together give a palindrome (42524).

The spelling of 42407117 in words is "forty-two million, four hundred seven thousand, one hundred seventeen".