725904

Appears in sequences

• Squares of even pentagonal numbers.at n=12A014770
• Squares which are the sum of twin prime pairs.at n=20A037072
• Squares that are the sum of four factorials.at n=10A082920
• Smallest x such that sigma(x) mod 210 = n.at n=19A097014
• Squares of pentagonal numbers: a(n) = (1/4)*n^2*(3*n-1)^2.at n=24A100255
• Perfect powers which are the sum of twin prime pairs.at n=23A119767
• Squares which are anagrams of cubes.at n=33A161860
• Perfect powers equal to the sum of 4 factorial numbers.at n=16A227645
• Numbers k such that phi(k)^phi(k) == 1 (mod sigma(k)).at n=19A248861