4421

Number
$4421$ (four thousand, four hundred and twenty-one) is:


 * The $601$st prime number


 * The $5$th prime number after $5$, $19$, $101$, $619$ of the form $\displaystyle \sum_{k \mathop = 0}^{n - 1} \paren {-1}^k \paren {n - k}!$:
 * $4421 = 7! - 6! + 5! - 4! + 3! - 2! + 1!$