258169 has 4 divisors (see below), whose sum is σ = 259200. Its totient is φ = 257140.

The previous prime is 258161. The next prime is 258173. The reversal of 258169 is 961852.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 258169 - 2³ = 258161 is a prime.

It is a super-2 number, since 2×258169² = 133302465122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

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 258169.

It is not an unprimeable number, because it can be changed into a prime (258161) 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 3 ways as a sum of consecutive naturals, for example, 132 + ... + 730.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2²⁵⁸¹⁶⁹ is an apocalyptic number.

It is an amenable number.

258169 is a deficient number, since it is larger than the sum of its proper divisors (1031).

258169 is an equidigital number, since it uses as much as digits as its factorization.

258169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030.

The product of its digits is 4320, while the sum is 31.

The square root of 258169 is about 508.1033359465. The cubic root of 258169 is about 63.6748647040.

The spelling of 258169 in words is "two hundred fifty-eight thousand, one hundred sixty-nine".