87130 has 8 divisors (see below), whose sum is σ = 156852. Its totient is φ = 34848.

The previous prime is 87121. The next prime is 87133. The reversal of 87130 is 3178.

87130 = 130² + 131² + ... + 134².

It can be written as a sum of positive squares in 2 ways, for example, as 82369 + 4761 = 287^2 + 69^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 87098 and 87107.

It is not an unprimeable number, because it can be changed into a prime (87133) 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, 4347 + ... + 4366.

2⁸⁷¹³⁰ is an apocalyptic number.

87130 is a deficient number, since it is larger than the sum of its proper divisors (69722).

87130 is a wasteful number, since it uses less digits than its factorization.

87130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8720.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 87130 is about 295.1779124528. The cubic root of 87130 is about 44.3325355853.

The spelling of 87130 in words is "eighty-seven thousand, one hundred thirty".