120243554 has 4 divisors (see below), whose sum is σ = 180365334. Its totient is φ = 60121776.

The previous prime is 120243551. The next prime is 120243559. The reversal of 120243554 is 455342021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455342021 = 29 ⋅15701449.

It can be written as a sum of positive squares in only one way, i.e., 110775625 + 9467929 = 10525^2 + 3077^2 .

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 as a sum of consecutive naturals, namely, 30060887 + ... + 30060890.

Almost surely, 2^120243554 is an apocalyptic number.

120243554 is a deficient number, since it is larger than the sum of its proper divisors (60121780).

120243554 is an equidigital number, since it uses as much as digits as its factorization.

120243554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60121779.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 120243554 is about 10965.5621834906. The cubic root of 120243554 is about 493.5758870362.

Adding to 120243554 its reverse (455342021), we get a palindrome (575585575).

The spelling of 120243554 in words is "one hundred twenty million, two hundred forty-three thousand, five hundred fifty-four".