Across:
A: E across multiplied with the digit sum of F across
C: G across plus the digit sum of G across
E: G across multiplied with the digit sum of A down
F: A prime number
G: The digit sum of G across is the same as its digit product.
H: A palindrome
I: This prime number equals the digit sum of A down minus the digit sum of G across.
J: J across plus 1 equals three times I across.
K: The digit sum of K across equals G across.
Down:
A: H across multiplied with E across
B: A across multiplied with E across
C: C down divided by G down equals F across plus the reverse of D down.
D: A square number
G: A prime number