2056609 has 4 divisors (see below), whose sum is σ = 2177604. Its totient is φ = 1935616.

The previous prime is 2056603. The next prime is 2056627. The reversal of 2056609 is 9066502.

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 1096209 + 960400 = 1047^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 2056609 - 2⁵ = 2056577 is a prime.

It is a Duffinian number.

2056609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2056603) 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, 60472 + ... + 60505.

It is an arithmetic number, because the mean of its divisors is an integer number (544401).

2^2056609 is an apocalyptic number.

It is an amenable number.

2056609 is a deficient number, since it is larger than the sum of its proper divisors (120995).

2056609 is a wasteful number, since it uses less digits than its factorization.

2056609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120994.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 2056609 is about 1434.0882120707. The cubic root of 2056609 is about 127.1697772757.

The spelling of 2056609 in words is "two million, fifty-six thousand, six hundred nine".