Q: Is 77,420 a Prime Number?
A: No, 77,420 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 77420 can be evenly divided by 1 2 4 5 7 10 14 20 28 35 49 70 79 98 140 158 196 245 316 395 490 553 790 980 1,106 1,580 2,212 2,765 3,871 5,530 7,742 11,060 15,484 19,355 38,710 and 77,420, with no remainder.
Since 77,420 cannot be divided by just 1 and 77,420, it is not a prime number.