Fatto matematico: 258 is a value of n so that n(n+9) is a palindrome.
Trivia: 258 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: September 14th is the day in 1979 that Afghan President Nur Muhammad Taraki is assassinated upon the order of Hafizullah Amin, who becomes the new president.