Across A: A down squared.
E: A palindrome.
F: This prime number equals A down divided by B down.
G: K across - F across
I: A multiple of J down.
K: M down + L across
L: The digit sum of A down.
N: A square number.
O: The sixth power of the digit sum of N down.
Down: A: The reverse of a prime number.
B: Subtract B down from A down and divide the result by B down. The final result equals N across.
C: A prime number.
D: The seventh power of the digit sum of N across.
H: J down + L across
J: This palindrome is a multiple of F across.
M: N down + F across
N: A multiple of L across.