128936725 has 12 divisors (see below), whose sum is σ = 160023364. Its totient is φ = 103057920.

The previous prime is 128936713. The next prime is 128936777. The reversal of 128936725 is 527639821.

It can be written as a sum of positive squares in 6 ways, for example, as 23409 + 128913316 = 153^2 + 11354^2 .

It is not a de Polignac number, because 128936725 - 2⁵ = 128936693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 49147 + ... + 51703.

Almost surely, 2^128936725 is an apocalyptic number.

It is an amenable number.

128936725 is a deficient number, since it is larger than the sum of its proper divisors (31086639).

128936725 is a wasteful number, since it uses less digits than its factorization.

128936725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4584 (or 4579 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 128936725 is about 11355.0308233840. The cubic root of 128936725 is about 505.1948076964.

The spelling of 128936725 in words is "one hundred twenty-eight million, nine hundred thirty-six thousand, seven hundred twenty-five".