4421

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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 $\ds \sum_{k \mathop = 0}^{n - 1} \paren {-1}^k \paren {n - k}!$:

$4421 = 7! - 6! + 5! - 4! + 3! - 2! + 1!$

Also see

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