1177

Number
$1177$ (one thousand, one hundred and seventy-seven) is:
 * $11 \times 107$


 * The $22$nd heptagonal number after $1$, $7$, $18$, $34$, $55$, $81$, $112$, $148$, $189$, $235$, $286$, $342$, $403$, $469$, $540$, $616$, $697$, $783$, $874$, $970$, $1071$:
 * $1177 = \displaystyle \sum_{k \mathop = 1}^{22} \left({5 k - 4}\right) = \dfrac {22 \left({5 \times 22 - 3}\right)} 2$