848021561 has 2 divisors, whose sum is σ = 848021562. Its totient is φ = 848021560.

The previous prime is 848021521. The next prime is 848021593. The reversal of 848021561 is 165120848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 826907536 + 21114025 = 28756^2 + 4595^2 .

It is a cyclic number.

It is not a de Polignac number, because 848021561 - 2⁶ = 848021497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (848021521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424010780 + 424010781.

It is an arithmetic number, because the mean of its divisors is an integer number (424010781).

Almost surely, 2^848021561 is an apocalyptic number.

It is an amenable number.

848021561 is a deficient number, since it is larger than the sum of its proper divisors (1).

848021561 is an equidigital number, since it uses as much as digits as its factorization.

848021561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 848021561 is about 29120.8097586588. The cubic root of 848021561 is about 946.5327201847.

The spelling of 848021561 in words is "eight hundred forty-eight million, twenty-one thousand, five hundred sixty-one".