128122 has 12 divisors (see below), whose sum is σ = 203130. Its totient is φ = 60536.

The previous prime is 128119. The next prime is 128147. The reversal of 128122 is 221821.

It can be written as a sum of positive squares in only one way, i.e., 108241 + 19881 = 329^2 + 141^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128096 and 128105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2703 + ... + 2749.

2¹²⁸¹²² is an apocalyptic number.

128122 is a deficient number, since it is larger than the sum of its proper divisors (75008).

128122 is an equidigital number, since it uses as much as digits as its factorization.

128122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 78 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 128122 is about 357.9413359756. The cubic root of 128122 is about 50.4128484082.

Adding to 128122 its reverse (221821), we get a palindrome (349943).

It can be divided in two parts, 1281 and 22, that multiplied together give a palindrome (28182).

The spelling of 128122 in words is "one hundred twenty-eight thousand, one hundred twenty-two".