The book is now available! 1242
(another Prime Pages' Curiosity)
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1242 = 1/2(sigma(1242)-phi(1242)). It is interesting that all numbers less than 1242 with this property are 12 & 42. [Firoozbakht]

 

  Submitted: 2004-10-08 08:17:07;   Last Modified: 2008-01-30 11:28:00.



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