1905

Number
$1905$ (one thousand, nine hundred and five) is:
 * $3 \times 5 \times 127$


 * The $7$th Poulet number after $341, 561, 645, 1105, 1387, 1729$:
 * $2^{1905} \equiv 2 \pmod {1905}$: $1905 = 3 \times 5 \times 127$