128422120 has 16 divisors (see below), whose sum is σ = 288949860. Its totient is φ = 51368832.

The previous prime is 128422103. The next prime is 128422139. The reversal of 128422120 is 21224821.

It can be written as a sum of positive squares in 2 ways, for example, as 115476516 + 12945604 = 10746^2 + 3598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128422091 and 128422100.

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, 1605237 + ... + 1605316.

Almost surely, 2^128422120 is an apocalyptic number.

128422120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128422120 is an abundant number, since it is smaller than the sum of its proper divisors (160527740).

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

128422120 is a wasteful number, since it uses less digits than its factorization.

128422120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210564 (or 3210560 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 128422120 is about 11332.3483885733. The cubic root of 128422120 is about 504.5218098626.

Adding to 128422120 its reverse (21224821), we get a palindrome (149646941).

The spelling of 128422120 in words is "one hundred twenty-eight million, four hundred twenty-two thousand, one hundred twenty".