6275025

Appears in sequences

• Smallest square with Hamming weight n (i.e., with exactly n 1's when written in binary).at n=17A089998
• Numbers k such that phi(k)^phi(k) == 1 (mod sigma(k)).at n=29A248861
• a(n) is the least perfect power A001597 with binary weight n.at n=16A386242