15857
This number is a composite.
15857 = prime(1*5*8*5*7) + phi(1*5*8*5*7) + sigma(1*5*8*5*7). It is the only known number with this property. [Firoozbakht]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a composite.
15857 = prime(1*5*8*5*7) + phi(1*5*8*5*7) + sigma(1*5*8*5*7). It is the only known number with this property. [Firoozbakht]