491520

491,520 is an interesting class 1 number. It can be expressed as 'four hundred ninety-one thousand, five hundred twenty' in both the short and long scales. It is equal to f2(15). Additionally, it has an unrelated property: As it is equal to 6C4 × 22 4−1, it also appears in -related combinatorics. --92.218.168.76 10:44, July 5, 2018 (UTC)