258365 has 4 divisors (see below), whose sum is σ = 310044. Its totient is φ = 206688.

The previous prime is 258353. The next prime is 258373. The reversal of 258365 is 563852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 195364 + 63001 = 442^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 258365 - 2⁸ = 258109 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258365.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25832 + ... + 25841.

It is an arithmetic number, because the mean of its divisors is an integer number (77511).

2²⁵⁸³⁶⁵ is an apocalyptic number.

It is an amenable number.

258365 is a deficient number, since it is larger than the sum of its proper divisors (51679).

258365 is an equidigital number, since it uses as much as digits as its factorization.

258365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51678.

The product of its digits is 7200, while the sum is 29.

The square root of 258365 is about 508.2961735052. The cubic root of 258365 is about 63.6909744570.

The spelling of 258365 in words is "two hundred fifty-eight thousand, three hundred sixty-five".