1105

This number is a composite.

1105 = 5 * 13 * 17 is the product of the three smallest primes of the form 4n + 1. [Capelle]

1105 and the next integer are the smallest pair of consecutive sphenic numbers whose reversals are prime. [Gaydos]

The second Carmichael number. [Dye]

1105! + 5011 is the smallest titanic prime of the form n! + R (n), where R (n) is the reversal of n. [Gupta]