128681146 has 16 divisors (see below), whose sum is σ = 211046400. Its totient is φ = 58358880.

The previous prime is 128681141. The next prime is 128681173. The reversal of 128681146 is 641186821.

It is not an unprimeable number, because it can be changed into a prime (128681141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3655 + ... + 16453.

It is an arithmetic number, because the mean of its divisors is an integer number (13190400).

Almost surely, 2^128681146 is an apocalyptic number.

128681146 is a deficient number, since it is larger than the sum of its proper divisors (82365254).

128681146 is a wasteful number, since it uses less digits than its factorization.

128681146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13269.

The product of its digits is 18432, while the sum is 37.

The square root of 128681146 is about 11343.7712424044. The cubic root of 128681146 is about 504.8607870361.

The spelling of 128681146 in words is "one hundred twenty-eight million, six hundred eighty-one thousand, one hundred forty-six".