4519561 has 2 divisors, whose sum is σ = 4519562. Its totient is φ = 4519560.

The previous prime is 4519547. The next prime is 4519589. The reversal of 4519561 is 1659154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4410000 + 109561 = 2100^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 4519561 - 2⁹ = 4519049 is a prime.

It is not a weakly prime, because it can be changed into another prime (4519591) 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, 2259780 + 2259781.

It is an arithmetic number, because the mean of its divisors is an integer number (2259781).

Almost surely, 2^4519561 is an apocalyptic number.

It is an amenable number.

4519561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4519561 is an equidigital number, since it uses as much as digits as its factorization.

4519561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 4519561 is about 2125.9259159246. The cubic root of 4519561 is about 165.3352351751.

The spelling of 4519561 in words is "four million, five hundred nineteen thousand, five hundred sixty-one".