128802851 has 4 divisors (see below), whose sum is σ = 129522600. Its totient is φ = 128083104.

The previous prime is 128802797. The next prime is 128802859. The reversal of 128802851 is 158208821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128802851 - 2⁶ = 128802787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128802859) 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, 359606 + ... + 359963.

It is an arithmetic number, because the mean of its divisors is an integer number (32380650).

Almost surely, 2^128802851 is an apocalyptic number.

128802851 is a deficient number, since it is larger than the sum of its proper divisors (719749).

128802851 is an equidigital number, since it uses as much as digits as its factorization.

128802851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719748.

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 128802851 is about 11349.1343722770. The cubic root of 128802851 is about 505.0199005326.

The spelling of 128802851 in words is "one hundred twenty-eight million, eight hundred two thousand, eight hundred fifty-one".