7021

Number
$7021$ (seven thousand and twenty-one) is:


 * $7 \times 17 \times 59$


 * The $118$th triangular number after $1$, $3$, $6$, $10$, $15$, $\ldots$, $5995$, $6105$, $6216$, $6328$, $6441$, $6555$, $6670$, $6786$, $6903$:
 * $7021 = \displaystyle \sum_{k \mathop = 1}^{118} k = \dfrac {118 \times \left({118 + 1}\right)} 2$