128029525 has 24 divisors (see below), whose sum is σ = 171870944. Its totient is φ = 94046400.

The previous prime is 128029513. The next prime is 128029529. The reversal of 128029525 is 525920821.

It is a happy number.

It is not a de Polignac number, because 128029525 - 2⁵ = 128029493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128029529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67642 + ... + 69508.

Almost surely, 2^128029525 is an apocalyptic number.

It is an amenable number.

128029525 is a deficient number, since it is larger than the sum of its proper divisors (43841419).

128029525 is a wasteful number, since it uses less digits than its factorization.

128029525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 128029525 is about 11315.0132567311. The cubic root of 128029525 is about 504.0071661134.

The spelling of 128029525 in words is "one hundred twenty-eight million, twenty-nine thousand, five hundred twenty-five".