2685849 has 4 divisors (see below), whose sum is σ = 3581136. Its totient is φ = 1790564.

The previous prime is 2685827. The next prime is 2685877. The reversal of 2685849 is 9485862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2685849 - 2⁵ = 2685817 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2685849.

It is not an unprimeable number, because it can be changed into a prime (2685649) 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 in 3 ways as a sum of consecutive naturals, for example, 447639 + ... + 447644.

It is an arithmetic number, because the mean of its divisors is an integer number (895284).

2^2685849 is an apocalyptic number.

It is an amenable number.

2685849 is a deficient number, since it is larger than the sum of its proper divisors (895287).

2685849 is an equidigital number, since it uses as much as digits as its factorization.

2685849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895286.

The product of its digits is 138240, while the sum is 42.

The square root of 2685849 is about 1638.8560034365. The cubic root of 2685849 is about 139.0039679353.

The spelling of 2685849 in words is "two million, six hundred eighty-five thousand, eight hundred forty-nine".