74

Number
$74$ (seventy-four) is:
 * $2 \times 37$


 * The $25$th semiprime:
 * $74 = 2 \times 37$


 * The $8$th nontotient after $14, 26, 34, 38, 50, 62, 68$:
 * $\nexists m \in \Z_{>0}: \phi \left({m}\right) = 74$
 * where $\phi \left({m}\right)$ denotes the Euler $\phi$ function


 * The $2$nd of the $2$nd ordered quadruple of consecutive integers that have sigma values which are strictly increasing:
 * $\sigma \left({73}\right) = 74$, $\sigma \left({74}\right) = 114$, $\sigma \left({75}\right) = 124$, $\sigma \left({76}\right) = 140$


 * The $1$st element of the $1$st pair of consecutive even nontotients.

Also see

 * Smallest Consecutive Even Nontotients