4564561 has 4 divisors (see below), whose sum is σ = 4572324. Its totient is φ = 4556800.

The previous prime is 4564559. The next prime is 4564589. The reversal of 4564561 is 1654654.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1654654 = 2 ⋅827327.

It can be written as a sum of positive squares in 2 ways, for example, as 1904400 + 2660161 = 1380^2 + 1631^2 .

It is a cyclic number.

It is not a de Polignac number, because 4564561 - 2¹ = 4564559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4564531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2920 + ... + 4201.

It is an arithmetic number, because the mean of its divisors is an integer number (1143081).

Almost surely, 2^4564561 is an apocalyptic number.

It is an amenable number.

4564561 is a deficient number, since it is larger than the sum of its proper divisors (7763).

4564561 is an equidigital number, since it uses as much as digits as its factorization.

4564561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7762.

The product of its digits is 14400, while the sum is 31.

The square root of 4564561 is about 2136.4833254673. The cubic root of 4564561 is about 165.8821561647.

The spelling of 4564561 in words is "four million, five hundred sixty-four thousand, five hundred sixty-one".