About this tool
Enter a whole number to inspect its properties: whether it is even or odd, positive or negative, prime, a perfect square, its full list of factors, its prime factorization, digit sum, digit count and binary and hexadecimal forms. All computed in your browser.
Frequently asked questions
Are properties based on the absolute value?
Primality, factors, the prime factorization and perfect-square checks use the absolute value, while parity and sign reflect the number as entered.
How large a number can I inspect?
Inputs are capped to a safe size so factorization stays fast. Very large numbers are rejected with a notice.