75625

Appears in sequences

• Numbers of the form 5^i * 11^j.at n=22A003598
• Odd numbers k that divide phi(k)*sigma(k).at n=32A015706
• a(n) = (7*n+2)^2.at n=39A017006
• a(n) = (8n + 3)^2.at n=34A017102
• a(n) = (10*n + 5)^2.at n=27A017330
• a(n) = (11*n)^2.at n=25A017390
• a(n) = (12*n + 11)^2.at n=22A017654
• Squares such that digits of sqrt(n) appear in both n and n^(3/2).at n=24A029781
• Numbers with 15 divisors.at n=35A030633
• Composite numbers whose prime factors contain no digits other than 1 and 5.at n=35A036305
• Numbers k that divide 3^k + 2^k.at n=20A045576
• Squares with initial digit '7'.at n=18A045791
• a(1)=9; if n = Product p_i^e_i, n > 1, then a(n) = Product p_{i+2}^{e_i+1}.at n=39A045972
• Numbers k such that k | 10^k + 9^k + 8^k + 7^k + 6^k + 5^k + 4^k + 3^k + 2^k + 1^k.at n=28A056739
• Numbers n such that the square root of n is an integer and a multiple of the sum of the digits of n.at n=29A067521
• Squares whose arithmetic mean of digits is an integer (i.e., the sum of digits is a multiple of the number of digits).at n=39A069711
• Squares whose decimal digits are nonsquares (2, 3, 5, 6, 7, 8).at n=17A077437
• Squares using only squarefree digits (2, 3, 5, 6, 7).at n=15A077676
• Left truncatable squares, ending in 5.at n=17A117246
• Invariant number of internal vertices of n-circum-C_5 H_5 systems.at n=10A122679