2520543 has 4 divisors (see below), whose sum is σ = 3360728. Its totient is φ = 1680360.

The previous prime is 2520503. The next prime is 2520577. The reversal of 2520543 is 3450252.

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

It is not a de Polignac number, because 2520543 - 2⁹ = 2520031 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520503) 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, 420088 + ... + 420093.

It is an arithmetic number, because the mean of its divisors is an integer number (840182).

2^2520543 is an apocalyptic number.

2520543 is a deficient number, since it is larger than the sum of its proper divisors (840185).

2520543 is an equidigital number, since it uses as much as digits as its factorization.

2520543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840184.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 2520543 is about 1587.6218063506. The cubic root of 2520543 is about 136.0916157494.

Adding to 2520543 its reverse (3450252), we get a palindrome (5970795).

The spelling of 2520543 in words is "two million, five hundred twenty thousand, five hundred forty-three".