12641

This number is a prime.

+ An emirp with both values center squared, i.e, 12641 = 79^2 + 80^2 and 14621 = 85^2 + 86^2. [Adams]

+ The smallest emirp using all the all-Niven numbers. [Loungrides]

(There is one curio for this number that has not yet been approved by an editor.)

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