4181 = 12 × (3 × 4 + 5 × 67) + 8 + 9
4181 = 9 × 8 + 76 × 54 + 3 + 2 × 1
4181 = 0^6 + 1^9 − 2^8 + 3^7 + 4^5 + 5^4 + 6^1 + 7^0 + 8^3 + 9^2
4181 = 34^2 + 55^2 = 41^2 + 50^2
4181^2 = 819^2 + 4100^2 = 1869^2 + 3740^2
4181 divides 73^16 - 1.
a(n) = n*(3*n+2), n = 37
Number that is the sum of 3 positive 5th powers.
Markoff (or Markov) number: positive integers x, y, z satisfying x^2 + y^2 + z^2 = 3*x*y*z
Fibonacci number: F(19)
Semiprime (Product of 2 Primes)
Factors: 1, 37, 113, 4181
Four thousand, one hundred eighty-one
Representations, Binary to Hexadecimal:
1000001010101_2
12201212_3
1001111_4
113211_5
31205_6
15122_7
10125_8
5655_9
3161_11
2505_12
1b98_13
1749_14
138b_15
1055_16
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Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
