2544805 has 4 divisors (see below), whose sum is σ = 3053772. Its totient is φ = 2035840.

The previous prime is 2544797. The next prime is 2544809. The reversal of 2544805 is 5084452.

2544805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 820836 + 1723969 = 906^2 + 1313^2 .

It is not a de Polignac number, because 2544805 - 2³ = 2544797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2544809) 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 3 ways as a sum of consecutive naturals, for example, 254476 + ... + 254485.

It is an arithmetic number, because the mean of its divisors is an integer number (763443).

2^2544805 is an apocalyptic number.

It is an amenable number.

2544805 is a deficient number, since it is larger than the sum of its proper divisors (508967).

2544805 is an equidigital number, since it uses as much as digits as its factorization.

2544805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508966.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 2544805 is about 1595.2444953674. The cubic root of 2544805 is about 136.5268813316.

The spelling of 2544805 in words is "two million, five hundred forty-four thousand, eight hundred five".