1177

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


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