6561001

Properties

Appears in sequences

• a(n) is the first term of the sexy prime quadruple a(n), a(n)+6, a(n)+12 and a(n)+18 that becomes a perfect square if the rightmost digit (1) is removed.at n=13A092445
• Primes of the form 9*n^3 + 1.at n=15A201263
• Numbers whose second digit is not zero and such that removing either the first or last digit leaves a square number.at n=39A343855
• Primes p such that there exists a cyclic permutation of the nonzero residues modulo p such that v^2 - 4*u*w == 0 (mod p) for any three consecutive residues u,v,w.at n=37A376008
• Prime numbersat n=448664