501000

Appears in sequences

• Long leg B of primitive Pythagorean triangles such that perimeters are Averages of twin prime pairs, q=p+1, a=q^2-p^2, c=q^2+p^2, b=2*p*q, s=a+b+c, s-+1 are primes.at n=29A155174
• Numbers n such that n^3 has n as its middle digits.at n=12A227548
• Smallest number k such that no n-digit triangular number begins with k.at n=11A254313
• a(n) = A322667(n) + 1.at n=5A317774