128852511 has 4 divisors (see below), whose sum is σ = 171803352. Its totient is φ = 85901672.

The previous prime is 128852501. The next prime is 128852527. The reversal of 128852511 is 115258821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 115258821 = 3 ⋅38419607.

It is a cyclic number.

It is not a de Polignac number, because 128852511 - 2¹³ = 128844319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128852501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21475416 + ... + 21475421.

It is an arithmetic number, because the mean of its divisors is an integer number (42950838).

Almost surely, 2^128852511 is an apocalyptic number.

128852511 is a deficient number, since it is larger than the sum of its proper divisors (42950841).

128852511 is an equidigital number, since it uses as much as digits as its factorization.

128852511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42950840.

The product of its digits is 6400, while the sum is 33.

The square root of 128852511 is about 11351.3219934949. The cubic root of 128852511 is about 505.0847957469.

The spelling of 128852511 in words is "one hundred twenty-eight million, eight hundred fifty-two thousand, five hundred eleven".