2558609 has 2 divisors, whose sum is σ = 2558610. Its totient is φ = 2558608.

The previous prime is 2558599. The next prime is 2558639. The reversal of 2558609 is 9068552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1507984 + 1050625 = 1228^2 + 1025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2558609 is a prime.

It is not a weakly prime, because it can be changed into another prime (2558639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1279304 + 1279305.

It is an arithmetic number, because the mean of its divisors is an integer number (1279305).

2^2558609 is an apocalyptic number.

It is an amenable number.

2558609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2558609 is an equidigital number, since it uses as much as digits as its factorization.

2558609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 2558609 is about 1599.5652534361. The cubic root of 2558609 is about 136.7732944062.

The spelling of 2558609 in words is "two million, five hundred fifty-eight thousand, six hundred nine".