2042609 has 2 divisors, whose sum is σ = 2042610. Its totient is φ = 2042608.

The previous prime is 2042603. The next prime is 2042627. The reversal of 2042609 is 9062402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 247009 = 1340^2 + 497^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042609 - 2⁸ = 2042353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2042603) 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, 1021304 + 1021305.

It is an arithmetic number, because the mean of its divisors is an integer number (1021305).

2^2042609 is an apocalyptic number.

It is an amenable number.

2042609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042609 is an equidigital number, since it uses as much as digits as its factorization.

2042609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2042609 is about 1429.1987265597. The cubic root of 2042609 is about 126.8805581297.

The spelling of 2042609 in words is "two million, forty-two thousand, six hundred nine".