Q: Is 1,401,640 a Prime Number?
A: No, 1,401,640 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 1401640 can be evenly divided by 1 2 4 5 8 10 20 40 67 134 268 335 523 536 670 1,046 1,340 2,092 2,615 2,680 4,184 5,230 10,460 20,920 35,041 70,082 140,164 175,205 280,328 350,410 700,820 and 1,401,640, with no remainder.
Since 1,401,640 cannot be divided by just 1 and 1,401,640, it is not a prime number.