258665 has 8 divisors (see below), whose sum is σ = 338688. Its totient is φ = 188080.

The previous prime is 258659. The next prime is 258673. The reversal of 258665 is 566852.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-258665 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258665.

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, 2297 + ... + 2406.

It is an arithmetic number, because the mean of its divisors is an integer number (42336).

2²⁵⁸⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

258665 is a deficient number, since it is larger than the sum of its proper divisors (80023).

258665 is a wasteful number, since it uses less digits than its factorization.

258665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719.

The product of its digits is 14400, while the sum is 32.

The square root of 258665 is about 508.5911914298. The cubic root of 258665 is about 63.7156164708.

The spelling of 258665 in words is "two hundred fifty-eight thousand, six hundred sixty-five".