1415 is a number that cannot be written as a sum of three squares.
1415 is the sum of nine consecutive primes: 1415 = 137 + 139 + 149 + 151 + 157 + 163 + 167 + 173 + 179.
1415 is a centered icosahedral number.
In the Battle of Agincourt on Oct. 25, 1415, the archers of Henry V of England were instrumental in defeating an army of French knights.
Source: What’s Special About This Number?
1415 is a centered icosahedral number.
In the Battle of Agincourt on Oct. 25, 1415, the archers of Henry V of England were instrumental in defeating an army of French knights.
Source: What’s Special About This Number?
