128529157 has 8 divisors (see below), whose sum is σ = 132267512. Its totient is φ = 124804800.

The previous prime is 128529151. The next prime is 128529211. The reversal of 128529157 is 751925821.

It can be written as a sum of positive squares in 4 ways, for example, as 24611521 + 103917636 = 4961^2 + 10194^2 .

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 128529157 - 2¹¹ = 128527109 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 (128529151) 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, 16807 + ... + 23227.

It is an arithmetic number, because the mean of its divisors is an integer number (16533439).

Almost surely, 2^128529157 is an apocalyptic number.

It is an amenable number.

128529157 is a deficient number, since it is larger than the sum of its proper divisors (3738355).

128529157 is an equidigital number, since it uses as much as digits as its factorization.

128529157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999.

The product of its digits is 50400, while the sum is 40.

The square root of 128529157 is about 11337.0700359484. The cubic root of 128529157 is about 504.6619401990.

The spelling of 128529157 in words is "one hundred twenty-eight million, five hundred twenty-nine thousand, one hundred fifty-seven".