42517660 has 24 divisors (see below), whose sum is σ = 90974016. Its totient is φ = 16685760.

The previous prime is 42517633. The next prime is 42517661. The reversal of 42517660 is 6671524.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42517661) 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, 18996 + ... + 21115.

It is an arithmetic number, because the mean of its divisors is an integer number (3790584).

Almost surely, 2^42517660 is an apocalyptic number.

It is an amenable number.

42517660 is an abundant number, since it is smaller than the sum of its proper divisors (48456356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42517660 is a wasteful number, since it uses less digits than its factorization.

42517660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40173 (or 40171 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 42517660 is about 6520.5567246977. The cubic root of 42517660 is about 349.0249323326.

It can be divided in two parts, 4251 and 7660, that added together give a palindrome (11911).

The spelling of 42517660 in words is "forty-two million, five hundred seventeen thousand, six hundred sixty".