814

814 = 2 x 11 x 37.

29 circles divide the plane into at most 814 regions.

814 is a value of n such that n(n + 5) is a palindrome: 814 x 819 = 666666.

814 is a member of the sequence generated by starting with 1, then repeatedly reversing the digits and adding 13: 1, 14, 54, 98, . . . , 108, 814, 431, . . .

814 is the numerical designation of a naval air squadron of the Royal Navy Fleet Air Arm nicknamed the "Flying Tigers."

Source: What’s Special About This Number?