258865 has 8 divisors (see below), whose sum is σ = 324288. Its totient is φ = 198000.

The previous prime is 258847. The next prime is 258871. The reversal of 258865 is 568852.

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

It is not a de Polignac number, because 258865 - 2⁷ = 258737 is a prime.

It is a super-2 number, since 2×258865² = 134022176450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 258865.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011 + ... + 1240.

It is an arithmetic number, because the mean of its divisors is an integer number (40536).

2²⁵⁸⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

258865 is a deficient number, since it is larger than the sum of its proper divisors (65423).

258865 is a wasteful number, since it uses less digits than its factorization.

258865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279.

The product of its digits is 19200, while the sum is 34.

The square root of 258865 is about 508.7877750104. The cubic root of 258865 is about 63.7320338966.

The spelling of 258865 in words is "two hundred fifty-eight thousand, eight hundred sixty-five".