2578591 has 2 divisors, whose sum is σ = 2578592. Its totient is φ = 2578590.

The previous prime is 2578573. The next prime is 2578603. The reversal of 2578591 is 1958752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2578591 - 2⁵ = 2578559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2578591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2578391) 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, 1289295 + 1289296.

It is an arithmetic number, because the mean of its divisors is an integer number (1289296).

2^2578591 is an apocalyptic number.

2578591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2578591 is an equidigital number, since it uses as much as digits as its factorization.

2578591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 37.

The square root of 2578591 is about 1605.7991779796. The cubic root of 2578591 is about 137.1284248722.

The spelling of 2578591 in words is "two million, five hundred seventy-eight thousand, five hundred ninety-one".