This number is a prime.
1877 is equal to the sum of three consecutive squares (24^2 + 25^2 + 26^2). [Schlesinger]
The year British mathematician J.W.L. Glaisher made his pioneering study of maximal prime gaps. He is remembered mostly for work in number theory that anticipated later interest in the detailed properties of modular forms.
An 1877 Indian Head Cent can be worth thousands of dollars.
The Reconstruction Era ended in 1877. [Locke]