412

Number
$412$ (four hundred and twelve) is:


 * $2^2 \times 103$


 * The $42$nd noncototient after $10$, $26$, $34$, $50$, $\ldots$, $344$, $346$, $362$, $366$, $372$, $386$, $394$, $404$:
 * $\nexists m \in \Z_{>0}: m - \phi \left({m}\right) = 412$
 * where $\phi \left({m}\right)$ denotes the Euler $\phi$ function


 * The $4$th positive integer $n$ after $157$, $262$, $367$ for which $\phi \left({2 n + 1}\right) < \phi \left({2 n}\right)$:
 * $\phi \left({2 \times 412 + 1}\right) = 400, \phi \left({2 \times 412}\right) = 408$