Number Gossip
(Enter a number and I'll tell you everything you wanted to know about it but were afraid to ask.)
Unique Properties of 1291
- 1291 is the smallest prime of the set of five consecutive primes whose sums of digits are a set of five distinct primes (Five consecutive primes are 1291, 1297, 1301, 1303, and 1307 with sums of digits 13, 19, 5, 7, and 11)
- 1291 is the smallest prime whose nearest neighbors are both sums of consecutive squares