258173 has 2 divisors, whose sum is σ = 258174. Its totient is φ = 258172.

The previous prime is 258161. The next prime is 258197. The reversal of 258173 is 371852.

258173 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178084 + 80089 = 422^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 258173 - 2⁴ = 258157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129086 + 129087.

It is an arithmetic number, because the mean of its divisors is an integer number (129087).

2²⁵⁸¹⁷³ is an apocalyptic number.

It is an amenable number.

258173 is a deficient number, since it is larger than the sum of its proper divisors (1).

258173 is an equidigital number, since it uses as much as digits as its factorization.

258173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 258173 is about 508.1072721385. The cubic root of 258173 is about 63.6751935559.

The spelling of 258173 in words is "two hundred fifty-eight thousand, one hundred seventy-three".