42508 has 6 divisors (see below), whose sum is σ = 74396. Its totient is φ = 21252.

The previous prime is 42499. The next prime is 42509. The reversal of 42508 is 80524.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (42509) by changing a digit.

42508 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310 + ... + 5317.

2⁴²⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

42508 is a deficient number, since it is larger than the sum of its proper divisors (31888).

42508 is a wasteful number, since it uses less digits than its factorization.

42508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10631 (or 10629 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 42508 is about 206.1746832179. The cubic root of 42508 is about 34.8998497543.

The spelling of 42508 in words is "forty-two thousand, five hundred eight".