852521 has 2 divisors, whose sum is σ = 852522. Its totient is φ = 852520.

The previous prime is 852463. The next prime is 852557. The reversal of 852521 is 125258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 212521 = 800^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 852521 - 2⁶ = 852457 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (852581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426260 + 426261.

It is an arithmetic number, because the mean of its divisors is an integer number (426261).

2⁸⁵²⁵²¹ is an apocalyptic number.

It is an amenable number.

852521 is a deficient number, since it is larger than the sum of its proper divisors (1).

852521 is an equidigital number, since it uses as much as digits as its factorization.

852521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 800, while the sum is 23.

The square root of 852521 is about 923.3206376985. The cubic root of 852521 is about 94.8203808246.

Adding to 852521 its reverse (125258), we get a palindrome (977779).

The spelling of 852521 in words is "eight hundred fifty-two thousand, five hundred twenty-one".