42530 has 8 divisors (see below), whose sum is σ = 76572. Its totient is φ = 17008.

The previous prime is 42509. The next prime is 42533. The reversal of 42530 is 3524.

It can be written as a sum of positive squares in 2 ways, for example, as 38809 + 3721 = 197^2 + 61^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42530.

It is not an unprimeable number, because it can be changed into a prime (42533) by changing a digit.

42530 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 in 3 ways as a sum of consecutive naturals, for example, 2117 + ... + 2136.

2⁴²⁵³⁰ is an apocalyptic number.

42530 is a deficient number, since it is larger than the sum of its proper divisors (34042).

42530 is a wasteful number, since it uses less digits than its factorization.

42530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 42530 is about 206.2280291328. The cubic root of 42530 is about 34.9058695174.

The spelling of 42530 in words is "forty-two thousand, five hundred thirty".