2390117

Properties

Appears in sequences

• Primes of form 4*p^2 + 1, p prime.at n=22A052292
• First of two consecutive (primes of the form n^2+1) with no semiprime of the same form between them.at n=28A242109
• Divisorial primes: primes p of the form p = 1 + Product_{d|k} d for some k.at n=24A258455
• Divisorial primes p of the form p = 1 + k^2 where k^2 = Product_{d|k} d= A007955(k) for some k.at n=22A258896
• Prime numbersat n=175633