2820539 has 4 divisors (see below), whose sum is σ = 2826456. Its totient is φ = 2814624.

The previous prime is 2820527. The next prime is 2820541. The reversal of 2820539 is 9350282.

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 2820539 - 2²⁰ = 1771963 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2820509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2174 + ... + 3219.

It is an arithmetic number, because the mean of its divisors is an integer number (706614).

2^2820539 is an apocalyptic number.

2820539 is a deficient number, since it is larger than the sum of its proper divisors (5917).

2820539 is an equidigital number, since it uses as much as digits as its factorization.

2820539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5916.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2820539 is about 1679.4460396214. The cubic root of 2820539 is about 141.2897650853.

The spelling of 2820539 in words is "two million, eight hundred twenty thousand, five hundred thirty-nine".