142,857

Number
$142 \, 857$ (one hundred and forty-two thousand, eight hundred and fifty-seven) is:


 * $3^3 \times 11 \times 13 \times 37$


 * The $25$th Kaprekar number after $1, 9, 45, 55, 99, 297, \ldots, 38962, 77 \, 778, 82 \, 656, 95 \, 121, 99 \, 999$:
 * $142 \, 857^2 = 20 \, 408 \, 122 \, 449 \to 20 \, 408 + 122 \, 449 = 142 \, 857$


 * The recurring part of the decimal expansion of the reciprocal of $7$:
 * $\dfrac 1 7 = 0 \cdotp \dot 14285 \dot 7$