8001 = 12 × 3 × (4 + 5 × 6 × 7 + 8) + 9
8001 = 9 × 876 + 54 + 3 × 21
8001 = 0^6 + 1^8 + 2^9 + 3^7 + 4^5 + 5^3 + 6^1 + 7^2 + 8^4 + 9^0
8001 = 1^3 + 20^3
8001 divides 19^6 - 1.
8001 = binomial(126 + 1, 2) is the 126th triangular number.
a(n) = n^3 + 1, 8001 = 20^3 + 1
Number k such that k divides the sum of digits of all numbers from 1 to k.
Factors: 1, 3, 7, 9, 21, 63, 127, 281, 889, 1143, 2667, 8001
Eight thousand, one
Representations, Binary to Hexadecimal:
1111101000001_2
101222100_3
1331001_4
224001_5
101013_6
32220_7
17501_8
11870_9
6014_11
4769_12
3846_13
2cb7_14
2586_15
1f41_16
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