128042 has 8 divisors (see below), whose sum is σ = 194916. Its totient is φ = 63072.

The previous prime is 128033. The next prime is 128047. The reversal of 128042 is 240821.

It can be written as a sum of positive squares in 2 ways, for example, as 121801 + 6241 = 349^2 + 79^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 11.

It is a zygodrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 128042.

It is not an unprimeable number, because it can be changed into a prime (128047) by changing a digit.

128042 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293 + ... + 584.

2¹²⁸⁰⁴² is an apocalyptic number.

128042 is a deficient number, since it is larger than the sum of its proper divisors (66874).

128042 is an equidigital number, since it uses as much as digits as its factorization.

128042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 128042 is about 357.8295683702. The cubic root of 128042 is about 50.4023535476.

Adding to 128042 its reverse (240821), we get a palindrome (368863).

The spelling of 128042 in words is "one hundred twenty-eight thousand, forty-two".