212890625domain: NAppears in sequencesAutomorphic numbers: m^2 ends with m.at n=16A003226Automorphic numbers ending in digit 5: a(n) = 5^(2^n) mod 10^n.at n=8A007185Numbers m such that m-th triangular number (A000217) ends in m.at n=10A067270Least n-digit automorphic number.at n=8A094190