852245621 has 4 divisors (see below), whose sum is σ = 852313644. Its totient is φ = 852177600.

The previous prime is 852245599. The next prime is 852245633. The reversal of 852245621 is 126542258.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 166539025 + 685706596 = 12905^2 + 26186^2 .

It is a cyclic number.

It is not a de Polignac number, because 852245621 - 2¹⁸ = 851983477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852245321) 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, 9170 + ... + 42291.

It is an arithmetic number, because the mean of its divisors is an integer number (213078411).

Almost surely, 2^852245621 is an apocalyptic number.

It is an amenable number.

852245621 is a deficient number, since it is larger than the sum of its proper divisors (68023).

852245621 is a wasteful number, since it uses less digits than its factorization.

852245621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68022.

The product of its digits is 38400, while the sum is 35.

The square root of 852245621 is about 29193.2461538624. The cubic root of 852245621 is about 948.1017018517.

Adding to 852245621 its reverse (126542258), we get a palindrome (978787879).

The spelling of 852245621 in words is "eight hundred fifty-two million, two hundred forty-five thousand, six hundred twenty-one".