142857 is a cyclic number.
Multiply the number by any digit in 1 to 6. The result will be a number having same digits as 142857 in the same order just rotated.
142857 * 1 = 142857
142857 * 2 = 285714
142857 * 3 = 428571
142857 * 4 = 571428
142857 * 5 = 714285
142857 * 6 = 857142
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