852641561 has 2 divisors, whose sum is σ = 852641562. Its totient is φ = 852641560.

The previous prime is 852641521. The next prime is 852641563. The reversal of 852641561 is 165146258.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 569729161 + 282912400 = 23869^2 + 16820^2 .

It is a cyclic number.

It is not a de Polignac number, because 852641561 - 2⁶ = 852641497 is a prime.

Together with 852641563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (852641563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426320780 + 426320781.

It is an arithmetic number, because the mean of its divisors is an integer number (426320781).

Almost surely, 2^852641561 is an apocalyptic number.

It is an amenable number.

852641561 is a deficient number, since it is larger than the sum of its proper divisors (1).

852641561 is an equidigital number, since it uses as much as digits as its factorization.

852641561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 38.

The square root of 852641561 is about 29200.0267294398. The cubic root of 852641561 is about 948.2485035326.

The spelling of 852641561 in words is "eight hundred fifty-two million, six hundred forty-one thousand, five hundred sixty-one".