128842142 has 32 divisors (see below), whose sum is σ = 229188960. Its totient is φ = 53550720.

The previous prime is 128842121. The next prime is 128842151. The reversal of 128842142 is 241248821.

It is a junction number, because it is equal to n+sod(n) for n = 128842099 and 128842108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29108 + ... + 33240.

It is an arithmetic number, because the mean of its divisors is an integer number (7162155).

Almost surely, 2^128842142 is an apocalyptic number.

128842142 is a deficient number, since it is larger than the sum of its proper divisors (100346818).

128842142 is a wasteful number, since it uses less digits than its factorization.

128842142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268.

The product of its digits is 8192, while the sum is 32.

The square root of 128842142 is about 11350.8652533628. The cubic root of 128842142 is about 505.0712470141.

The spelling of 128842142 in words is "one hundred twenty-eight million, eight hundred forty-two thousand, one hundred forty-two".