Q: Is 781,120 a Prime Number?
A: No, 781,120 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 781120 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 160 320 2,441 4,882 9,764 12,205 19,528 24,410 39,056 48,820 78,112 97,640 156,224 195,280 390,560 and 781,120, with no remainder.
Since 781,120 cannot be divided by just 1 and 781,120, it is not a prime number.