128804525 has 6 divisors (see below), whose sum is σ = 159717642. Its totient is φ = 103043600.

The previous prime is 128804491. The next prime is 128804539. The reversal of 128804525 is 525408821.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2601769 + 126202756 = 1613^2 + 11234^2 .

It is not a de Polignac number, because 128804525 - 2¹⁰ = 128803501 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 5 ways as a sum of consecutive naturals, for example, 2576066 + ... + 2576115.

It is an arithmetic number, because the mean of its divisors is an integer number (26619607).

Almost surely, 2^128804525 is an apocalyptic number.

It is an amenable number.

128804525 is a deficient number, since it is larger than the sum of its proper divisors (30913117).

128804525 is an equidigital number, since it uses as much as digits as its factorization.

128804525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152191 (or 5152186 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 128804525 is about 11349.2081221555. The cubic root of 128804525 is about 505.0220883715.

The spelling of 128804525 in words is "one hundred twenty-eight million, eight hundred four thousand, five hundred twenty-five".