852234721 has 36 divisors (see below), whose sum is σ = 994249980. Its totient is φ = 729855360.

The previous prime is 852234689. The next prime is 852234781. The reversal of 852234721 is 127432258.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 149719696 + 702515025 = 12236^2 + 26505^2 .

It is not a de Polignac number, because 852234721 - 2⁵ = 852234689 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (852234781) 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 35 ways as a sum of consecutive naturals, for example, 3721435 + ... + 3721663.

It is an arithmetic number, because the mean of its divisors is an integer number (27618055).

Almost surely, 2^852234721 is an apocalyptic number.

It is an amenable number.

852234721 is a deficient number, since it is larger than the sum of its proper divisors (142015259).

852234721 is a wasteful number, since it uses less digits than its factorization.

852234721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 322 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 852234721 is about 29193.0594662499. The cubic root of 852234721 is about 948.0976598430.

Adding to 852234721 its reverse (127432258), we get a palindrome (979666979).

The spelling of 852234721 in words is "eight hundred fifty-two million, two hundred thirty-four thousand, seven hundred twenty-one".