General fact: 745 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 745 is the smallest number whose square begins with three 5's.
Trivia: 745 is an unremarkable number.
Historical date: January 14th is the day in 1957 that Jagadguru Kripalu Maharaj was named fifth Jagad guru (world teacher) after giving seven days of speeches before 500 Hindu scholars.