Friday, February 11, 2011

805

805 = 5 x 7 x 23.

805 is divisible by the sum of its prime factors.

8052 = 648,025 = (-6 + 4 + 802 + 5)2. The digits of the square of 805 include the digits of 805 as a subsequence.

805 degrees Celsius is 1481 degrees Fahrenheit, a prime temperature.

805 is the number of possible positions in the game of checkers after four moves.

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