3721

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Number

$3721$ (three thousand, seven hundred and twenty-one) is:

$61^2$

The $61$st square number after $1$, $4$, $9$, $16$, $25$, $36$, $\ldots$, $3249$, $3364$, $3481$, $3600$:

$3721 = 61 \times 61$

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