Q: Is 3,572,721 a Prime Number?
A: No, 3,572,721 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 3572721 can be evenly divided by 1 3 9 27 113 339 1,017 1,171 3,051 3,513 10,539 31,617 132,323 396,969 1,190,907 and 3,572,721, with no remainder.
Since 3,572,721 cannot be divided by just 1 and 3,572,721, it is not a prime number.