2605543 has 2 divisors, whose sum is σ = 2605544. Its totient is φ = 2605542.

The previous prime is 2605531. The next prime is 2605579. The reversal of 2605543 is 3455062.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2605543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2605523) 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, 1302771 + 1302772.

It is an arithmetic number, because the mean of its divisors is an integer number (1302772).

2^2605543 is an apocalyptic number.

2605543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605543 is an equidigital number, since it uses as much as digits as its factorization.

2605543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 2605543 is about 1614.1694458761. The cubic root of 2605543 is about 137.6045353821.

The spelling of 2605543 in words is "two million, six hundred five thousand, five hundred forty-three".