Monday, March 8, 2010


415 = 5 x 83.

4, 1, and 5 are the second, third, and fourth decimal digits of pi.

415 is a number that cannot be written as a sum of three squares.

415 is the tenth Iccanobif number, where each term is the reverse of the sum of the previous two numbers.

415 is the telephone area code for San Francisco.

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