2605849 has 2 divisors, whose sum is σ = 2605850. Its totient is φ = 2605848.

The previous prime is 2605847. The next prime is 2605871. The reversal of 2605849 is 9485062.

It is a happy number.

2605849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 915849 = 1300^2 + 957^2 .

It is a cyclic number.

It is not a de Polignac number, because 2605849 - 2¹ = 2605847 is a prime.

Together with 2605847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2605847) 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, 1302924 + 1302925.

It is an arithmetic number, because the mean of its divisors is an integer number (1302925).

2^2605849 is an apocalyptic number.

It is an amenable number.

2605849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605849 is an equidigital number, since it uses as much as digits as its factorization.

2605849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2605849 is about 1614.2642286813. The cubic root of 2605849 is about 137.6099220187.

The spelling of 2605849 in words is "two million, six hundred five thousand, eight hundred forty-nine".