852252021 has 6 divisors (see below), whose sum is σ = 1231030710. Its totient is φ = 568168008.

The previous prime is 852252019. The next prime is 852252047. The reversal of 852252021 is 120252258.

It can be written as a sum of positive squares in only one way, i.e., 581484996 + 270767025 = 24114^2 + 16455^2 .

It is not a de Polignac number, because 852252021 - 2¹ = 852252019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852252091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47347326 + ... + 47347343.

It is an arithmetic number, because the mean of its divisors is an integer number (205171785).

Almost surely, 2^852252021 is an apocalyptic number.

It is an amenable number.

852252021 is a deficient number, since it is larger than the sum of its proper divisors (378778689).

852252021 is a wasteful number, since it uses less digits than its factorization.

852252021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94694675 (or 94694672 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 852252021 is about 29193.3557680511. The cubic root of 852252021 is about 948.1040751251.

The spelling of 852252021 in words is "eight hundred fifty-two million, two hundred fifty-two thousand, twenty-one".