2805206 has 4 divisors (see below), whose sum is σ = 4207812. Its totient is φ = 1402602.

The previous prime is 2805203. The next prime is 2805227. The reversal of 2805206 is 6025082.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701300 + ... + 701303.

It is an arithmetic number, because the mean of its divisors is an integer number (1051953).

2^2805206 is an apocalyptic number.

2805206 is a deficient number, since it is larger than the sum of its proper divisors (1402606).

2805206 is a wasteful number, since it uses less digits than its factorization.

2805206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402605.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2805206 is about 1674.8749207030. The cubic root of 2805206 is about 141.0332735048.

The spelling of 2805206 in words is "two million, eight hundred five thousand, two hundred six".