Cross Number Quiz Puzzle Answer

Enter numbers into the grid that comply with the following clues:

Across

2. The sum of the digits in 2 down (2)

4. A prime number (2)

5. 1 down + 2 across + 3 down (3)

Down

1. A palindromic number (2)

2. 9 x 1 down (3)

3. 4 across squared (3)