Q: Is 1,123,640 a Prime Number?
A: No, 1,123,640 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 1123640 can be evenly divided by 1 2 4 5 7 8 10 14 20 28 35 40 56 70 140 280 4,013 8,026 16,052 20,065 28,091 32,104 40,130 56,182 80,260 112,364 140,455 160,520 224,728 280,910 561,820 and 1,123,640, with no remainder.
Since 1,123,640 cannot be divided by just 1 and 1,123,640, it is not a prime number.