285130 has 8 divisors (see below), whose sum is σ = 513252. Its totient is φ = 114048.

The previous prime is 285121. The next prime is 285139. The reversal of 285130 is 31582.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (285121) and next prime (285139).

It can be written as a sum of positive squares in 2 ways, for example, as 271441 + 13689 = 521^2 + 117^2 .

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 = 285098 and 285107.

It is not an unprimeable number, because it can be changed into a prime (285139) 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, 14247 + ... + 14266.

2²⁸⁵¹³⁰ is an apocalyptic number.

285130 is a deficient number, since it is larger than the sum of its proper divisors (228122).

285130 is a wasteful number, since it uses less digits than its factorization.

285130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28520.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 285130 is about 533.9756548758. The cubic root of 285130 is about 65.8184480936.

The spelling of 285130 in words is "two hundred eighty-five thousand, one hundred thirty".