4816561 has 2 divisors, whose sum is σ = 4816562. Its totient is φ = 4816560.

The previous prime is 4816541. The next prime is 4816597. The reversal of 4816561 is 1656184.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3010225 + 1806336 = 1735^2 + 1344^2 .

It is a cyclic number.

It is not a de Polignac number, because 4816561 - 2⁷ = 4816433 is a prime.

It is not a weakly prime, because it can be changed into another prime (4816531) 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, 2408280 + 2408281.

It is an arithmetic number, because the mean of its divisors is an integer number (2408281).

Almost surely, 2^4816561 is an apocalyptic number.

It is an amenable number.

4816561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4816561 is an equidigital number, since it uses as much as digits as its factorization.

4816561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

The square root of 4816561 is about 2194.6664894694. Note that the first 3 decimals coincide. The cubic root of 4816561 is about 168.8803115995.

The spelling of 4816561 in words is "four million, eight hundred sixteen thousand, five hundred sixty-one".