7591

This number is a prime.

Prime 7591 is the sum of the squares of seven consecutive primes: 7591 = 19^2 + 23^2 + 29^2 + 31^2 + 37^2 + 41^2 + 43^2. It is just the fourth prime number with the property; the three smaller ones are 1543, 3271, and 4519. [Keith]