2805013 has 4 divisors (see below), whose sum is σ = 2836620. Its totient is φ = 2773408.

The previous prime is 2805001. The next prime is 2805031. The reversal of 2805013 is 3105082.

It is a happy number.

2805013 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 an emirpimes, since its reverse is a distinct semiprime: 3105082 = 2 ⋅1552541.

It can be written as a sum of positive squares in 2 ways, for example, as 439569 + 2365444 = 663^2 + 1538^2 .

It is a cyclic number.

It is not a de Polignac number, because 2805013 - 2¹⁷ = 2673941 is a prime.

It is a Duffinian number.

2805013 is a lucky number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805043) 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, 15670 + ... + 15847.

It is an arithmetic number, because the mean of its divisors is an integer number (709155).

2^2805013 is an apocalyptic number.

It is an amenable number.

2805013 is a deficient number, since it is larger than the sum of its proper divisors (31607).

2805013 is an equidigital number, since it uses as much as digits as its factorization.

2805013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31606.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2805013 is about 1674.8173034692. The cubic root of 2805013 is about 141.0300390370.

The spelling of 2805013 in words is "two million, eight hundred five thousand, thirteen".