258285 has 16 divisors (see below), whose sum is σ = 421056. Its totient is φ = 135168.

The previous prime is 258283. The next prime is 258299. The reversal of 258285 is 582852.

258285 = 26² + 27² + ... + 92².

It is not a de Polignac number, because 258285 - 2¹ = 258283 is a prime.

It is a super-3 number, since 3×258285³ = 51691461333897375, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877 + ... + 1133.

It is an arithmetic number, because the mean of its divisors is an integer number (26316).

2²⁵⁸²⁸⁵ is an apocalyptic number.

It is an amenable number.

258285 is a deficient number, since it is larger than the sum of its proper divisors (162771).

258285 is a wasteful number, since it uses less digits than its factorization.

258285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332.

The product of its digits is 6400, while the sum is 30.

The square root of 258285 is about 508.2174731353. The cubic root of 258285 is about 63.6844000320.

The spelling of 258285 in words is "two hundred fifty-eight thousand, two hundred eighty-five".