2564443 has 8 divisors (see below), whose sum is σ = 2958560. Its totient is φ = 2177280.

The previous prime is 2564423. The next prime is 2564447. The reversal of 2564443 is 3444652.

2564443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2564443 - 2¹⁷ = 2433371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564447) 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 7 ways as a sum of consecutive naturals, for example, 918 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (369820).

2^2564443 is an apocalyptic number.

2564443 is a deficient number, since it is larger than the sum of its proper divisors (394117).

2564443 is a wasteful number, since it uses less digits than its factorization.

2564443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477.

The product of its digits is 11520, while the sum is 28.

The square root of 2564443 is about 1601.3878355976. The cubic root of 2564443 is about 136.8771698189.

The spelling of 2564443 in words is "two million, five hundred sixty-four thousand, four hundred forty-three".