1141

Number
$1141$ (one thousand, one hundred and forty-one) is:
 * $7 \times 163$


 * The $20$th centered hexagonal number after $1, 7, 19, 37, 61, 91, 127, 169, 217, 271, 331, 397, 469, 547, 631, 721, 817, 919, 1027$:
 * $1141 = \displaystyle 1 + \sum_{k \mathop = 1}^{20 - 1} 6 k = 20^3 - 19^3$