=IF(ISNUMBER(I146)*(I146>0),CHAR(252),"")

The above formula works fine only I need it to return CHAR(251) if the
result is FALSE
The following is an attempt at doing this but is not correct.

=IF(ISNUMBER(I146)*(I146>0),CHAR(252),"")*OR(IF(ISNUMBER(I146)*(I146>0),CHAR(251),""))

Thank you for helping.
Pat