4565561 has 16 divisors (see below), whose sum is σ = 6131328. Its totient is φ = 3283200.

The previous prime is 4565551. The next prime is 4565563. The reversal of 4565561 is 1655654.

It is a cyclic number.

It is not a de Polignac number, because 4565561 - 2⁶ = 4565497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4565563) 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 in 15 ways as a sum of consecutive naturals, for example, 1280 + ... + 3281.

It is an arithmetic number, because the mean of its divisors is an integer number (383208).

Almost surely, 2^4565561 is an apocalyptic number.

It is an amenable number.

4565561 is a deficient number, since it is larger than the sum of its proper divisors (1565767).

4565561 is a wasteful number, since it uses less digits than its factorization.

4565561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592.

The product of its digits is 18000, while the sum is 32.

The square root of 4565561 is about 2136.7173420928. The cubic root of 4565561 is about 165.8942690524.

It can be divided in two parts, 4 and 565561, that added together give a palindrome (565565).

The spelling of 4565561 in words is "four million, five hundred sixty-five thousand, five hundred sixty-one".