14. A four-digit number, its four digits satisfy:
(1) they are all different;
(2) their sum is 16;
(3) one digit is twice another digit;
(4) one digit is three times another digit. The smallest four-digit number is $\qquad$
\begin{tabular}{c}
\hline 14 \\
\hline 1267
\end{tabular}