4950

Number
$4950$ (four thousand, nine hundred and fifty) is:


 * $2 \times 3^2 \times 5^2 \times 11$


 * The $6$th hexamorphic number after $1$, $45$, $66$, $1225$, $1326$:
 * $4950 = H_{50}$


 * The $12$th Kaprekar number after $1$, $9$, $45$, $55$, $99$, $297$, $703$, $999$, $2223$, $2728$, $4879$:
 * $4950^2 = 24 \, 502 \, 500 \to 2450 + 2500 = 4950$