128120 has 16 divisors (see below), whose sum is σ = 288360. Its totient is φ = 51232.

The previous prime is 128119. The next prime is 128147. The reversal of 128120 is 21821.

It is a junction number, because it is equal to n+sod(n) for n = 128095 and 128104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1562 + ... + 1641.

2¹²⁸¹²⁰ is an apocalyptic number.

128120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128120 is an abundant number, since it is smaller than the sum of its proper divisors (160240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128120 is a wasteful number, since it uses less digits than its factorization.

128120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214 (or 3210 counting only the distinct ones).

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

The square root of 128120 is about 357.9385422108. The cubic root of 128120 is about 50.4125860899.

Adding to 128120 its reverse (21821), we get a palindrome (149941).

The spelling of 128120 in words is "one hundred twenty-eight thousand, one hundred twenty".