2685321 has 6 divisors (see below), whose sum is σ = 3878810. Its totient is φ = 1790208.

The previous prime is 2685311. The next prime is 2685323. The reversal of 2685321 is 1235862.

2685321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2595321 + 90000 = 1611^2 + 300^2 .

It is not a de Polignac number, because 2685321 - 2⁶ = 2685257 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 6⁷ + 8 + 5 + 3¹¹ + 2²¹ + 1 .

It is a Duffinian number.

2685321 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2685323) 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 in 5 ways as a sum of consecutive naturals, for example, 149176 + ... + 149193.

2^2685321 is an apocalyptic number.

It is an amenable number.

2685321 is a deficient number, since it is larger than the sum of its proper divisors (1193489).

2685321 is a wasteful number, since it uses less digits than its factorization.

2685321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298375 (or 298372 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2685321 is about 1638.6949075408. The cubic root of 2685321 is about 138.9948585991.

The spelling of 2685321 in words is "two million, six hundred eighty-five thousand, three hundred twenty-one".