1621 (the 257th prime)

 
Next prime1627
Previous prime1619
Octal(3125)8
Hexadecimal(655)16
Prime gap6
111th Sexy prime (the small number)The big number is 1627 .
123rd Prime of the Form 3n+1132 + 3 * 222
123rd Prime of the Form 4n+1102 + 392