Q: Is 1,121,720 a Prime Number?
A: No, 1,121,720 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 1121720 can be evenly divided by 1 2 4 5 8 10 20 29 40 58 116 145 232 290 580 967 1,160 1,934 3,868 4,835 7,736 9,670 19,340 28,043 38,680 56,086 112,172 140,215 224,344 280,430 560,860 and 1,121,720, with no remainder.
Since 1,121,720 cannot be divided by just 1 and 1,121,720, it is not a prime number.