2643345 has 12 divisors (see below), whose sum is σ = 4581876. Its totient is φ = 1409760.

The previous prime is 2643343. The next prime is 2643349. The reversal of 2643345 is 5433462.

It can be written as a sum of positive squares in 2 ways, for example, as 804609 + 1838736 = 897^2 + 1356^2 .

It is not a de Polignac number, because 2643345 - 2¹ = 2643343 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁷ + 6 + 4³ + 3⁵ + 3¹³ + 4¹⁰ + 5 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2643341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29326 + ... + 29415.

It is an arithmetic number, because the mean of its divisors is an integer number (381823).

2^2643345 is an apocalyptic number.

It is an amenable number.

2643345 is a deficient number, since it is larger than the sum of its proper divisors (1938531).

2643345 is a wasteful number, since it uses less digits than its factorization.

2643345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58752 (or 58749 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 2643345 is about 1625.8367076678. The cubic root of 2643345 is about 138.2668120998.

The spelling of 2643345 in words is "two million, six hundred forty-three thousand, three hundred forty-five".