Q: Is 672,400 a Prime Number?
A: No, 672,400 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 672400 can be evenly divided by 1 2 4 5 8 10 16 20 25 40 41 50 80 82 100 164 200 205 328 400 410 656 820 1,025 1,640 1,681 2,050 3,280 3,362 4,100 6,724 8,200 8,405 13,448 16,400 16,810 26,896 33,620 42,025 67,240 84,050 134,480 168,100 336,200 and 672,400, with no remainder.
Since 672,400 cannot be divided by just 1 and 672,400, it is not a prime number.