87530 has 8 divisors (see below), whose sum is σ = 157572. Its totient is φ = 35008.

The previous prime is 87523. The next prime is 87539. The reversal of 87530 is 3578.

It can be written as a sum of positive squares in 2 ways, for example, as 85849 + 1681 = 293^2 + 41^2 .

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

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 87496 and 87505.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 87530.

It is not an unprimeable number, because it can be changed into a prime (87539) 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, 4367 + ... + 4386.

2⁸⁷⁵³⁰ is an apocalyptic number.

87530 is a deficient number, since it is larger than the sum of its proper divisors (70042).

87530 is a wasteful number, since it uses less digits than its factorization.

87530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8760.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 87530 is about 295.8546940645. The cubic root of 87530 is about 44.4002732445.

The spelling of 87530 in words is "eighty-seven thousand, five hundred thirty".