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The Number 405: Properties and Meanings
Prime Factors of 405=3x3x3x3x5.405 is a 13-gonal Number.
405 is a 42-gonal Number.
405 is a 136-gonal Number.
405 is a Pentagonal Pyramidal Number.
The Year 405 AD
In the year 405 AD ...
The Main Number Sections:
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