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The Number 1681: Properties and MeaningsPrime Factors of 1681=41x41.
1681 is a Centered Octagonal Number.
1681 is a Centered 14-gonal Number.
1681 is a Centered 16-gonal Number.
1681 is a square and each of its two 2-digit parts is square.
The Year 1681 ADIn the year 1681 AD William Lilly, astrologer and translator of Trithemius, died.(Esoteric History)
Share any properties and meanings for particular Numbers...contact me directly, thanks.