This number is a prime.
8971 is the largest 4-digit prime p for which p^2 + reversal(p) is also prime: 8971^2 + 1798 = 80480639, which is prime. [Keith]
8971 is the largest 4-digit prime p for which p^2 +
reversal(p) is also prime: 8971^2 + 1798 = 80480639, which
is prime. [Keith]