1854

Number
$1854$ (one thousand, eight hundred and fifty-four) is:


 * $2 \times 3^2 \times 103$


 * The $7$th subfactorial after $0$, $1$, $2$, $9$, $44$, $265$:
 * $1854 = \, !7 = 7! \left({1 - \dfrac 1 {1!} + \dfrac 1 {2!} - \dfrac 1 {3!} + \dfrac 1 {4!} - \dfrac 1 {5!} + \dfrac 1 {6!} - \dfrac 1 {7!} }\right)$