2560813 has 4 divisors (see below), whose sum is σ = 2564188. Its totient is φ = 2557440.

The previous prime is 2560793. The next prime is 2560823. The reversal of 2560813 is 3180652.

It is a happy number.

2560813 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1885129 + 675684 = 1373^2 + 822^2 .

It is a cyclic number.

It is not a de Polignac number, because 2560813 - 2¹³ = 2552621 is a prime.

It is a Duffinian number.

2560813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560823) 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, 43 + ... + 2263.

It is an arithmetic number, because the mean of its divisors is an integer number (641047).

2^2560813 is an apocalyptic number.

It is an amenable number.

2560813 is a deficient number, since it is larger than the sum of its proper divisors (3375).

2560813 is a wasteful number, since it uses less digits than its factorization.

2560813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3374.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2560813 is about 1600.2540423320. The cubic root of 2560813 is about 136.8125555602.

The spelling of 2560813 in words is "two million, five hundred sixty thousand, eight hundred thirteen".