42

This number is a composite.

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42 = (π(4)*π(2)) * (prime(4)*prime(2)). Note that 42 is the only number less than 20000000 with this property. [Firoozbakht]

Submitted: 2004-08-13 11:09:56;   Last Modified: 2008-01-30 11:28:00.
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