4678561 has 2 divisors, whose sum is σ = 4678562. Its totient is φ = 4678560.

The previous prime is 4678549. The next prime is 4678567. The reversal of 4678561 is 1658764.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4161600 + 516961 = 2040^2 + 719^2 .

It is a cyclic number.

It is not a de Polignac number, because 4678561 - 2⁹ = 4678049 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4678561.

It is not a weakly prime, because it can be changed into another prime (4678567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2339280 + 2339281.

It is an arithmetic number, because the mean of its divisors is an integer number (2339281).

Almost surely, 2^4678561 is an apocalyptic number.

It is an amenable number.

4678561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4678561 is an equidigital number, since it uses as much as digits as its factorization.

4678561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 4678561 is about 2162.9981507158. The cubic root of 4678561 is about 167.2517865158.

The spelling of 4678561 in words is "four million, six hundred seventy-eight thousand, five hundred sixty-one".