3721

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


 * $61^2$


 * The $61$st square number after $1$, $4$, $9$, $16$, $25$, $36$, $\ldots$, $3249$, $3364$, $3481$, $3600$:
 * $3721 = 61 \times 61$