852322721 has 4 divisors (see below), whose sum is σ = 852699972. Its totient is φ = 851945472.

The previous prime is 852322717. The next prime is 852322741. The reversal of 852322721 is 127223258.

852322721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 790228321 + 62094400 = 28111^2 + 7880^2 .

It is a cyclic number.

It is not a de Polignac number, because 852322721 - 2² = 852322717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (852322741) 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, 185216 + ... + 189761.

It is an arithmetic number, because the mean of its divisors is an integer number (213174993).

Almost surely, 2^852322721 is an apocalyptic number.

It is an amenable number.

852322721 is a deficient number, since it is larger than the sum of its proper divisors (377251).

852322721 is a wasteful number, since it uses less digits than its factorization.

852322721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377250.

The product of its digits is 13440, while the sum is 32.

The square root of 852322721 is about 29194.5666349066. The cubic root of 852322721 is about 948.1302915896.

Adding to 852322721 its reverse (127223258), we get a palindrome (979545979).

The spelling of 852322721 in words is "eight hundred fifty-two million, three hundred twenty-two thousand, seven hundred twenty-one".