The Number 1642: Properties and MeaningsPrime Factors of 1642=2x821.
1642 is a 275-gonal Number.
The Year 1642 ADIn the year 1642 AD Frenchman, Blaise Pascal invented an adding machine.
In the year 1642 AD Galileo dies at his villa in Florence, still under house arrest from charges of heresy.
In the year 1642 AD the fifth Dalai Lama took power in Tibet.
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