Mathematical fact: 84530 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 84530 is an uninteresting number.
Historical date: June 8th is the day in 1856 that a group of 194 Pitcairn Islanders, descendants of the mutineers of HMS Bounty, arrives at Norfolk Island commencing the Third Settlement of the Island.