128569135 has 8 divisors (see below), whose sum is σ = 155874096. Its totient is φ = 101794560.

The previous prime is 128569099. The next prime is 128569141. The reversal of 128569135 is 531965821.

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

It is not a de Polignac number, because 128569135 - 2⁹ = 128568623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132061 + ... + 133030.

It is an arithmetic number, because the mean of its divisors is an integer number (19484262).

Almost surely, 2^128569135 is an apocalyptic number.

128569135 is a deficient number, since it is larger than the sum of its proper divisors (27304961).

128569135 is an equidigital number, since it uses as much as digits as its factorization.

128569135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265193.

The product of its digits is 64800, while the sum is 40.

The square root of 128569135 is about 11338.8330528322. The cubic root of 128569135 is about 504.7142585058.

The spelling of 128569135 in words is "one hundred twenty-eight million, five hundred sixty-nine thousand, one hundred thirty-five".