128534825 has 6 divisors (see below), whose sum is σ = 159383214. Its totient is φ = 102827840.

The previous prime is 128534761. The next prime is 128534837. The reversal of 128534825 is 528435821.

It can be written as a sum of positive squares in 3 ways, for example, as 29929 + 128504896 = 173^2 + 11336^2 .

It is not a de Polignac number, because 128534825 - 2⁶ = 128534761 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2570672 + ... + 2570721.

It is an arithmetic number, because the mean of its divisors is an integer number (26563869).

Almost surely, 2^128534825 is an apocalyptic number.

It is an amenable number.

128534825 is a deficient number, since it is larger than the sum of its proper divisors (30848389).

128534825 is an equidigital number, since it uses as much as digits as its factorization.

128534825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141403 (or 5141398 counting only the distinct ones).

The product of its digits is 76800, while the sum is 38.

The square root of 128534825 is about 11337.3200095966. The cubic root of 128534825 is about 504.6693584427.

The spelling of 128534825 in words is "one hundred twenty-eight million, five hundred thirty-four thousand, eight hundred twenty-five".