128755042 has 32 divisors (see below), whose sum is σ = 226204272. Its totient is φ = 54411264.

The previous prime is 128755037. The next prime is 128755049. The reversal of 128755042 is 240557821.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 48455521 + 80299521 = 6961^2 + 8961^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 128754989 and 128755007.

It is not an unprimeable number, because it can be changed into a prime (128755049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12418 + ... + 20290.

Almost surely, 2^128755042 is an apocalyptic number.

128755042 is a deficient number, since it is larger than the sum of its proper divisors (97449230).

128755042 is a wasteful number, since it uses less digits than its factorization.

128755042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7942.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 128755042 is about 11347.0278928008. The cubic root of 128755042 is about 504.9574084264.

The spelling of 128755042 in words is "one hundred twenty-eight million, seven hundred fifty-five thousand, forty-two".