128234529 has 8 divisors (see below), whose sum is σ = 189977120. Its totient is φ = 85489668.

The previous prime is 128234497. The next prime is 128234539. The reversal of 128234529 is 925432821.

It is a happy number.

128234529 is a `hidden beast` number, since 128 + 2 + 3 + 4 + 529 = 666.

It is not a de Polignac number, because 128234529 - 2⁵ = 128234497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128234493 and 128234502.

It is not an unprimeable number, because it can be changed into a prime (128234539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2374687 + ... + 2374740.

It is an arithmetic number, because the mean of its divisors is an integer number (23747140).

Almost surely, 2^128234529 is an apocalyptic number.

It is an amenable number.

128234529 is a deficient number, since it is larger than the sum of its proper divisors (61742591).

128234529 is an equidigital number, since it uses as much as digits as its factorization.

128234529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749436 (or 4749430 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 128234529 is about 11324.0685709687. The cubic root of 128234529 is about 504.2760321843.

The spelling of 128234529 in words is "one hundred twenty-eight million, two hundred thirty-four thousand, five hundred twenty-nine".