128275529 has 8 divisors (see below), whose sum is σ = 130870080. Its totient is φ = 125687536.

The previous prime is 128275519. The next prime is 128275547. The reversal of 128275529 is 925572821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128275529 - 2²⁴ = 111498313 is a prime.

It is a super-2 number, since 2×128275529² = 32909222680459682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128275519) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 61892 + ... + 63930.

It is an arithmetic number, because the mean of its divisors is an integer number (16358760).

Almost surely, 2^128275529 is an apocalyptic number.

It is an amenable number.

128275529 is a deficient number, since it is larger than the sum of its proper divisors (2594551).

128275529 is a wasteful number, since it uses less digits than its factorization.

128275529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279.

The product of its digits is 100800, while the sum is 41.

The square root of 128275529 is about 11325.8787297057. The cubic root of 128275529 is about 504.3297699578.

The spelling of 128275529 in words is "one hundred twenty-eight million, two hundred seventy-five thousand, five hundred twenty-nine".