2820543 has 16 divisors (see below), whose sum is σ = 4141056. Its totient is φ = 1693440.

The previous prime is 2820541. The next prime is 2820553. The reversal of 2820543 is 3450282.

It is not a de Polignac number, because 2820543 - 2¹ = 2820541 is a prime.

2820543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820541) 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, 3855 + ... + 4527.

It is an arithmetic number, because the mean of its divisors is an integer number (258816).

2^2820543 is an apocalyptic number.

2820543 is a deficient number, since it is larger than the sum of its proper divisors (1320513).

2820543 is a wasteful number, since it uses less digits than its factorization.

2820543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2820543 is about 1679.4472304898. The cubic root of 2820543 is about 141.2898318761.

The spelling of 2820543 in words is "two million, eight hundred twenty thousand, five hundred forty-three".