128725692 has 24 divisors (see below), whose sum is σ = 303278976. Its totient is φ = 42491568.

The previous prime is 128725673. The next prime is 128725721. The reversal of 128725692 is 296527821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50838 + ... + 53309.

It is an arithmetic number, because the mean of its divisors is an integer number (12636624).

Almost surely, 2^128725692 is an apocalyptic number.

128725692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128725692 is an abundant number, since it is smaller than the sum of its proper divisors (174553284).

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

128725692 is a wasteful number, since it uses less digits than its factorization.

128725692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104257 (or 104255 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 128725692 is about 11345.7345288879. The cubic root of 128725692 is about 504.9190367868.

The spelling of 128725692 in words is "one hundred twenty-eight million, seven hundred twenty-five thousand, six hundred ninety-two".