427

Number
$427$ (four hundred and twenty-seven) is:


 * $7 \times 61$


 * The $15$th integer $m$ after $1$, $2$, $3$, $11$, $27$, $37$, $41$, $73$, $77$, $116$, $154$, $320$, $340$, $399$ such that $m! + 1$ is prime