675684

Appears in sequences

• Squares containing 2k digits in which the sum of the first k digits = that of the rest.at n=24A068897
• Square associated with twin primes (p,p+2): p(p+2) + 1. Square of the average of twin primes.at n=31A075369
• a(n) = x^2 = A090116(n)^2 is the least square that is "surrounded" by two closest primes, by prevprime(x^2) and nextprime(x^2) whose difference nextprime - prevprime = 2n.at n=34A090117
• Least square beginning with the digit reversal of n^2.at n=23A111443
• Numbers k such that k and k^2 use only the digits 4, 5, 6, 7 and 8.at n=28A137140
• Numbers n such that the decimal expansions of both n and n^2 have 4 as the digit with the smallest value and 8 as the digit with the largest value.at n=10A254071
• Squares whose arithmetic mean of digits is 6 (i.e., the sum of digits is 6 times the number of digits).at n=20A316486