Q: Is 1,243,264 a Prime Number?
A: No, 1,243,264 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 1243264 can be evenly divided by 1 2 4 8 11 16 22 32 44 64 88 128 176 352 704 883 1,408 1,766 3,532 7,064 9,713 14,128 19,426 28,256 38,852 56,512 77,704 113,024 155,408 310,816 621,632 and 1,243,264, with no remainder.
Since 1,243,264 cannot be divided by just 1 and 1,243,264, it is not a prime number.