2107

Number
$2107$ (two thousand, one hundred and seven) is:
 * $7^2 \times 43$


 * The $27$th centered hexagonal number after $1$, $7$, $19$, $37$, $61$, $91$, $127$, $\ldots$, $817$, $919$, $1027$, $1141$, $1261$, $1387$, $1519$, $1657$, $1801$, $1951$:
 * $2107 = \ds 1 + \sum_{k \mathop = 1}^{27 - 1} 6 k = 27^3 - 26^3$