Q: Is 4,023,621 a Prime Number?
A: No, 4,023,621 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 4023621 can be evenly divided by 1 3 7 9 21 27 61 63 183 189 349 427 549 1,047 1,281 1,647 2,443 3,141 3,843 7,329 9,423 11,529 21,289 21,987 63,867 65,961 149,023 191,601 447,069 574,803 1,341,207 and 4,023,621, with no remainder.
Since 4,023,621 cannot be divided by just 1 and 4,023,621, it is not a prime number.