435472

This number is a composite.

Just showing those entries submitted by 'Firoozbakht': (Click here to show all)

435472 = sigma(prime(4)*4! + prime(3)*3! + prime(5)*5! + prime(4)*4! + prime(7)*7! + prime(2)*2!). Note that 435472 is the smallest number with this property. [Firoozbakht]