285513 has 8 divisors (see below), whose sum is σ = 400800. Its totient is φ = 180288.

The previous prime is 285497. The next prime is 285517. The reversal of 285513 is 315582.

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

It is not a de Polignac number, because 285513 - 2⁴ = 285497 is a prime.

285513 is a modest number, since divided by 513 gives 285 as remainder.

It is not an unprimeable number, because it can be changed into a prime (285517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2448 + ... + 2561.

It is an arithmetic number, because the mean of its divisors is an integer number (50100).

2²⁸⁵⁵¹³ is an apocalyptic number.

It is an amenable number.

285513 is a deficient number, since it is larger than the sum of its proper divisors (115287).

285513 is a wasteful number, since it uses less digits than its factorization.

285513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5031.

The product of its digits is 1200, while the sum is 24.

The square root of 285513 is about 534.3341651064. The cubic root of 285513 is about 65.8479050512.

The spelling of 285513 in words is "two hundred eighty-five thousand, five hundred thirteen".