Number 142857

This happens with other numbers too.
See how the digits switch their place.

• 1 × 142,857 = 142,857
• 2 × 142,857 = 285,714
• 3 × 142,857 = 428,571
• 4 × 142,857 = 571,428
• 5 × 142,857 = 714,285
• 6 × 142,857 = 857,142
• 7 × 142,857 = 999,999