120243556 has 18 divisors (see below), whose sum is σ = 213386082. Its totient is φ = 59287680.

The previous prime is 120243551. The next prime is 120243559. The reversal of 120243556 is 655342021.

It can be written as a sum of positive squares in 3 ways, for example, as 61873956 + 58369600 = 7866^2 + 7640^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (120243551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18496 + ... + 24136.

Almost surely, 2^120243556 is an apocalyptic number.

It is an amenable number.

120243556 is a deficient number, since it is larger than the sum of its proper divisors (93142526).

120243556 is an equidigital number, since it uses as much as digits as its factorization.

120243556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5791 (or 5716 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 120243556 is about 10965.5622746852. The cubic root of 120243556 is about 493.5758897727.

Adding to 120243556 its reverse (655342021), we get a palindrome (775585577).

The spelling of 120243556 in words is "one hundred twenty million, two hundred forty-three thousand, five hundred fifty-six".