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The Number 12251225 is a Triangular Number. 1225 is a Square Number(35x35). 1225 is a Hexagonal Number. 1225 is a 29-gonal Number. 1225 is a Centered Octagonal Number.
1225 is a Centered Nonagonal Number.
The Year 1225 ADIn the year 1225 AD Henry married the daughter Leopold VI, the Austrian Duke.
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