2865243 has 16 divisors (see below), whose sum is σ = 3983616. Its totient is φ = 1830240.

The previous prime is 2865241. The next prime is 2865259. The reversal of 2865243 is 3425682.

It is not a de Polignac number, because 2865243 - 2¹ = 2865241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2865243.

It is not an unprimeable number, because it can be changed into a prime (2865241) 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 15 ways as a sum of consecutive naturals, for example, 9058 + ... + 9368.

It is an arithmetic number, because the mean of its divisors is an integer number (248976).

2^2865243 is an apocalyptic number.

2865243 is a deficient number, since it is larger than the sum of its proper divisors (1118373).

2865243 is a wasteful number, since it uses less digits than its factorization.

2865243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434.

The product of its digits is 11520, while the sum is 30.

The square root of 2865243 is about 1692.7028681963. The cubic root of 2865243 is about 142.0323109704.

The spelling of 2865243 in words is "two million, eight hundred sixty-five thousand, two hundred forty-three".