258017 has 4 divisors (see below), whose sum is σ = 261936. Its totient is φ = 254100.

The previous prime is 257993. The next prime is 258019. The reversal of 258017 is 710852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 258017 - 2⁶ = 257953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257983 and 258001.

It is not an unprimeable number, because it can be changed into a prime (258019) 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, 1859 + ... + 1992.

It is an arithmetic number, because the mean of its divisors is an integer number (65484).

2²⁵⁸⁰¹⁷ is an apocalyptic number.

It is an amenable number.

258017 is a deficient number, since it is larger than the sum of its proper divisors (3919).

258017 is an equidigital number, since it uses as much as digits as its factorization.

258017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 258017 is about 507.9537380510. The cubic root of 258017 is about 63.6623658118.

Adding to 258017 its reverse (710852), we get a palindrome (968869).

The spelling of 258017 in words is "two hundred fifty-eight thousand, seventeen".