Num3er 1258723

 
 

A Pentagonal number is a polygonal number of the form   n \, (3 \, n - 1) \,/ \,2

1258723   is a prime number.
 

1258723   is also prime index of a 13-digital palindromic pentagonal number

1258723 \, (3 \times 1258723 - 1)/2 \; = \; 2376574756732
 

2376574756732 \; = \; 2^2 \times 11^2 \times 47 \times 83 \times 1258723

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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About benvitalis

math grad - Interest: Number theory
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