6201
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Number
$6201$ (six thousand, two hundred and one) is:
- $3^2 \times 13 \times 53$
- The $26$th square pyramidal number after $1$, $5$, $14$, $30$, $55$, $\ldots$, $1015$, $1240$, $1496$, $1785$, $2109$, $2470$, $2870$, $3311$, $3795$, $4324$, $4900$, $5525$:
- $6201 = \ds \sum_{k \mathop = 1}^{26} k^2 = \dfrac {26 \paren {26 + 1} \paren {2 \times 26 + 1} } 6$