4047 = 12 + 34 × (5 + 6 × 7 + 8 × 9)
4047 = 98 + 7 + 6 × (54 + 32) × 1
4047 = 0^8 + 1^9 − 2^6 + 3^7 + 4^5 + 5^4 + 6^3 + 7^2 + 8^1 + 9^0
4047 divides 20^14 - 1.
4047 cannot be written as a sum of 3 squares. (Integers that are not a sum of three squares)
Sphenic number: Product of 3 distinct Primes, (List)
Factors: 1, 3, 19, 57, 71, 213, 1349, 4047
four thousand, forty-seven
Representations, Binary to Hexadecimal:
111111001111_2
12112220_3
333033_4
112142_5
30423_6
14541_7
7717_8
5486_9
304a_11
2413_12
1ac4_13
1691_14
12ec_15
fcf_16
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Undergraduate Texts in Mathematics
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