258287 has 4 divisors (see below), whose sum is σ = 259896. Its totient is φ = 256680.

The previous prime is 258283. The next prime is 258299. The reversal of 258287 is 782852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 258287 - 2² = 258283 is a prime.

It is a Duffinian 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533 + ... + 894.

It is an arithmetic number, because the mean of its divisors is an integer number (64974).

2²⁵⁸²⁸⁷ is an apocalyptic number.

258287 is a deficient number, since it is larger than the sum of its proper divisors (1609).

258287 is a wasteful number, since it uses less digits than its factorization.

258287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608.

The product of its digits is 8960, while the sum is 32.

The square root of 258287 is about 508.2194407930. The cubic root of 258287 is about 63.6845644092.

It can be divided in two parts, 258 and 287, that added together give a palindrome (545).

The spelling of 258287 in words is "two hundred fifty-eight thousand, two hundred eighty-seven".