General fact: 1258 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 1258 is the number of commutative asymmetric semigroups of order 6.
Trivia: 1258 is an unremarkable number.
Historical date: June 11th is the day in 1998 that Compaq Computer pays $9 billion for Digital Equipment Corporation in the largest high-tech acquisition.