6201

Number
$6201$ (six thousand, two hundred and one) is:


 * $3^2 \times 13 \times 53$


 * The $26$th square pyramidal number after $1$, $5$, $14$, $30$, $55$, $\ldots$, $1015$, $1240$, $1496$, $1785$, $2109$, $2470$, $2870$, $3311$, $3795$, $4324$, $4900$, $5525$:
 * $6201 = \displaystyle \sum_{k \mathop = 1}^{26} k^2 = \dfrac {26 \left({26 + 1}\right) \left({2 \times 26 + 1}\right)} 6$