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<1680 Number Data-Base
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The Number 1681: Properties and Meanings

Prime Factors of 1681=41x41.

1681 is a Square Number(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 AD

In the year 1681 AD William Lilly, astrologer and translator of Trithemius, died.(Esoteric History)

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