128081825 has 24 divisors (see below), whose sum is σ = 175488768. Its totient is φ = 92238080.

The previous prime is 128081809. The next prime is 128081843. The reversal of 128081825 is 528180821.

It is not a de Polignac number, because 128081825 - 2⁴ = 128081809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3224 + ... + 16326.

It is an arithmetic number, because the mean of its divisors is an integer number (7312032).

Almost surely, 2^128081825 is an apocalyptic number.

It is an amenable number.

128081825 is a deficient number, since it is larger than the sum of its proper divisors (47406943).

128081825 is a wasteful number, since it uses less digits than its factorization.

128081825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13153 (or 13148 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 128081825 is about 11317.3241095234. The cubic root of 128081825 is about 504.0757856663.

The spelling of 128081825 in words is "one hundred twenty-eight million, eighty-one thousand, eight hundred twenty-five".