1470

Number
$1470$ (one thousand, four hundred and seventy) is:


 * $2 \times 3 \times 5 \times 7^2$


 * The $14$th pentagonal pyramidal number after $1, 6, 12, 40, 75, 126, 196, 288, 405, 550, 726, 936, 1183$:
 * $1470 = \displaystyle \sum_{k \mathop = 1}^{14} \dfrac {k \left({3 k - 1}\right)} 2 = \dfrac {14^2 \left({14 + 1}\right)} 2$