Q: Is 5,721,920 a Prime Number?
A: No, 5,721,920 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 5721920 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 64 80 160 320 17,881 35,762 71,524 89,405 143,048 178,810 286,096 357,620 572,192 715,240 1,144,384 1,430,480 2,860,960 and 5,721,920, with no remainder.
Since 5,721,920 cannot be divided by just 1 and 5,721,920, it is not a prime number.