128529 has 6 divisors (see below), whose sum is σ = 185666. Its totient is φ = 85680.

The previous prime is 128521. The next prime is 128549. The reversal of 128529 is 925821.

It can be written as a sum of positive squares in only one way, i.e., 65025 + 63504 = 255^2 + 252^2 .

It is not a de Polignac number, because 128529 - 2³ = 128521 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7132 + ... + 7149.

2¹²⁸⁵²⁹ is an apocalyptic number.

It is an amenable number.

128529 is a deficient number, since it is larger than the sum of its proper divisors (57137).

128529 is a wasteful number, since it uses less digits than its factorization.

128529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14287 (or 14284 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 128529 is about 358.5094141023. The cubic root of 128529 is about 50.4661734715.

The spelling of 128529 in words is "one hundred twenty-eight thousand, five hundred twenty-nine".