258191 has 8 divisors (see below), whose sum is σ = 276480. Its totient is φ = 240408.

The previous prime is 258173. The next prime is 258197. The reversal of 258191 is 191852.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 258191 - 2⁶ = 258127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 258191.

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 258191.

It is not an unprimeable number, because it can be changed into a prime (258197) by changing a digit.

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, 1970 + ... + 2096.

It is an arithmetic number, because the mean of its divisors is an integer number (34560).

2²⁵⁸¹⁹¹ is an apocalyptic number.

258191 is a deficient number, since it is larger than the sum of its proper divisors (18289).

258191 is a wasteful number, since it uses less digits than its factorization.

258191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253.

The product of its digits is 720, while the sum is 26.

The square root of 258191 is about 508.1249846248. The cubic root of 258191 is about 63.6766733477.

The spelling of 258191 in words is "two hundred fifty-eight thousand, one hundred ninety-one".