128116542 has 16 divisors (see below), whose sum is σ = 256442112. Its totient is φ = 42670680.

The previous prime is 128116537. The next prime is 128116543. The reversal of 128116542 is 245611821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128116543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84 + ... + 16007.

It is an arithmetic number, because the mean of its divisors is an integer number (16027632).

Almost surely, 2^128116542 is an apocalyptic number.

128116542 is an abundant number, since it is smaller than the sum of its proper divisors (128325570).

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

128116542 is a wasteful number, since it uses less digits than its factorization.

128116542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17423.

The product of its digits is 3840, while the sum is 30.

The square root of 128116542 is about 11318.8578045667. The cubic root of 128116542 is about 504.1213253520.

The spelling of 128116542 in words is "one hundred twenty-eight million, one hundred sixteen thousand, five hundred forty-two".