2605871 has 2 divisors, whose sum is σ = 2605872. Its totient is φ = 2605870.

The previous prime is 2605849. The next prime is 2605909. The reversal of 2605871 is 1785062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2605871 - 2¹⁴ = 2589487 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2605171) 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, 1302935 + 1302936.

It is an arithmetic number, because the mean of its divisors is an integer number (1302936).

2^2605871 is an apocalyptic number.

2605871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605871 is an equidigital number, since it uses as much as digits as its factorization.

2605871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 2605871 is about 1614.2710429169. The cubic root of 2605871 is about 137.6103092769.

The spelling of 2605871 in words is "two million, six hundred five thousand, eight hundred seventy-one".