8120641 has 2 divisors, whose sum is σ = 8120642. Its totient is φ = 8120640.

The previous prime is 8120617. The next prime is 8120653. The reversal of 8120641 is 1460218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6230016 + 1890625 = 2496^2 + 1375^2 .

It is a cyclic number.

It is not a de Polignac number, because 8120641 - 2⁹ = 8120129 is a prime.

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is not a weakly prime, because it can be changed into another prime (8120741) 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, 4060320 + 4060321.

It is an arithmetic number, because the mean of its divisors is an integer number (4060321).

Almost surely, 2^8120641 is an apocalyptic number.

It is an amenable number.

8120641 is a deficient number, since it is larger than the sum of its proper divisors (1).

8120641 is an equidigital number, since it uses as much as digits as its factorization.

8120641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 8120641 is about 2849.6738409860. The cubic root of 8120641 is about 201.0003300243. Note that the first 3 decimals are identical.

Adding to 8120641 its reverse (1460218), we get a palindrome (9580859).

The spelling of 8120641 in words is "eight million, one hundred twenty thousand, six hundred forty-one".