2985643 has 4 divisors (see below), whose sum is σ = 3009280. Its totient is φ = 2962008.

The previous prime is 2985629. The next prime is 2985667. The reversal of 2985643 is 3465892.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2985643 - 2⁵ = 2985611 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2985613) 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, 11628 + ... + 11881.

It is an arithmetic number, because the mean of its divisors is an integer number (752320).

2^2985643 is an apocalyptic number.

2985643 is a deficient number, since it is larger than the sum of its proper divisors (23637).

2985643 is a wasteful number, since it uses less digits than its factorization.

2985643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23636.

The product of its digits is 51840, while the sum is 37.

The square root of 2985643 is about 1727.9013282014. The cubic root of 2985643 is about 143.9945181812.

Subtracting 2985643 from its reverse (3465892), we obtain a square (480249 = 693²).

The spelling of 2985643 in words is "two million, nine hundred eighty-five thousand, six hundred forty-three".