It is a congruent number.
Almost surely, 2120424656 is an apocalyptic number.
120424656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
120424656 is a wasteful number, since it uses less digits than its factorization.
120424656 is an evil number, because the sum of its binary digits is even.
The square root of 120424656 is about 10973.8168382746. The cubic root of 120424656 is about 493.8235586396.
Adding to 120424656 its reverse (656424021), we get a palindrome (776848677).
The spelling of 120424656 in words is "one hundred twenty million, four hundred twenty-four thousand, six hundred fifty-six".