8026561 has 2 divisors, whose sum is σ = 8026562. Its totient is φ = 8026560.

The previous prime is 8026559. The next prime is 8026583. The reversal of 8026561 is 1656208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7529536 + 497025 = 2744^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 8026561 - 2¹ = 8026559 is a prime.

Together with 8026559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8026511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4013280 + 4013281.

It is an arithmetic number, because the mean of its divisors is an integer number (4013281).

Almost surely, 2^8026561 is an apocalyptic number.

It is an amenable number.

8026561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8026561 is an equidigital number, since it uses as much as digits as its factorization.

8026561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 8026561 is about 2833.1185997060. The cubic root of 8026561 is about 200.2210971568.

The spelling of 8026561 in words is "eight million, twenty-six thousand, five hundred sixty-one".