128852291 has 4 divisors (see below), whose sum is σ = 130667184. Its totient is φ = 127037400.

The previous prime is 128852267. The next prime is 128852359. The reversal of 128852291 is 192258821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192258821 = 709 ⋅271169.

It is a cyclic number.

It is not a de Polignac number, because 128852291 - 2²⁶ = 61743427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128852201) 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 3 ways as a sum of consecutive naturals, for example, 907340 + ... + 907481.

It is an arithmetic number, because the mean of its divisors is an integer number (32666796).

Almost surely, 2^128852291 is an apocalyptic number.

128852291 is a deficient number, since it is larger than the sum of its proper divisors (1814893).

128852291 is an equidigital number, since it uses as much as digits as its factorization.

128852291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814892.

The product of its digits is 23040, while the sum is 38.

The square root of 128852291 is about 11351.3123029895. The cubic root of 128852291 is about 505.0845082898.

The spelling of 128852291 in words is "one hundred twenty-eight million, eight hundred fifty-two thousand, two hundred ninety-one".