1087

Number
$1087$ (one thousand and eighty-seven) is:


 * The $181$st prime number


 * The $21$st obstinate number after $1$, $127$, $149$, $251$, $331$, $337$, $373$, $509$, $599$, $701$, $757$, $757$, $809$, $877$, $905$, $907$, $959$, $977$, $997$, $1019$


 * The $24$th of $29$ primes of the form $2 x^2 + 29$:
 * $2 \times 23^2 + 29 = 1087$