120128 has 14 divisors (see below), whose sum is σ = 238506. Its totient is φ = 60032.

The previous prime is 120121. The next prime is 120157. The reversal of 120128 is 821021.

It can be written as a sum of positive squares in only one way, i.e., 107584 + 12544 = 328^2 + 112^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 875 + ... + 1002.

2¹²⁰¹²⁸ is an apocalyptic number.

It is an amenable number.

120128 is a deficient number, since it is larger than the sum of its proper divisors (118378).

120128 is an equidigital number, since it uses as much as digits as its factorization.

120128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889 (or 1879 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 120128 is about 346.5948643590. The cubic root of 120128 is about 49.3417727628.

Adding to 120128 its reverse (821021), we get a palindrome (941149).

The spelling of 120128 in words is "one hundred twenty thousand, one hundred twenty-eight".