128019042 has 20 divisors (see below), whose sum is σ = 286857846. Its totient is φ = 42672960.

The previous prime is 128019029. The next prime is 128019077. The reversal of 128019042 is 240910821.

It can be written as a sum of positive squares in only one way, i.e., 124746561 + 3272481 = 11169^2 + 1809^2 .

It is a super-2 number, since 2×128019042² = 32777750229195528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 128018997 and 128019015.

It is an unprimeable number.

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 in 9 ways as a sum of consecutive naturals, for example, 394959 + ... + 395282.

Almost surely, 2^128019042 is an apocalyptic number.

128019042 is an abundant number, since it is smaller than the sum of its proper divisors (158838804).

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

128019042 is an equidigital number, since it uses as much as digits as its factorization.

128019042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790255 (or 790246 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 128019042 is about 11314.5500131468. The cubic root of 128019042 is about 503.9934097778.

Adding to 128019042 its reverse (240910821), we get a palindrome (368929863).

The spelling of 128019042 in words is "one hundred twenty-eight million, nineteen thousand, forty-two".