1379

Number
$1379$ (one thousand, three hundred and seventy-nine) is:


 * $7 \times 197$


 * The magic constant of the order $14$ magic square:
 * $1379 = \dfrac {14 \left({14^2 + 1}\right)} 2$


 * The magic constant of a magic square of order $14$, after $1$, $(5)$, $15$, $34$, $65$, $111$, $175$, $260$, $369$, $505$, $671$, $870$, $1105$:
 * $1379 = \displaystyle \dfrac 1 {14} \sum_{k \mathop = 1}^{14^2} k = \dfrac {14 \paren {14^2 + 1} } 2$