2045009 has 2 divisors, whose sum is σ = 2045010. Its totient is φ = 2045008.

The previous prime is 2044979. The next prime is 2045011. The reversal of 2045009 is 9005402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1555009 + 490000 = 1247^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045009 - 2⁸ = 2044753 is a prime.

It is a Sophie Germain prime.

Together with 2045011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2045089) 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 as a sum of consecutive naturals, namely, 1022504 + 1022505.

It is an arithmetic number, because the mean of its divisors is an integer number (1022505).

2^2045009 is an apocalyptic number.

It is an amenable number.

2045009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045009 is an equidigital number, since it uses as much as digits as its factorization.

2045009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2045009 is about 1430.0381113803. The cubic root of 2045009 is about 126.9302322071.

The spelling of 2045009 in words is "two million, forty-five thousand, nine".