2543530 has 32 divisors (see below), whose sum is σ = 5261760. Its totient is φ = 875520.

The previous prime is 2543509. The next prime is 2543537. The reversal of 2543530 is 353452.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (2543537) 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, 1482 + ... + 2698.

It is an arithmetic number, because the mean of its divisors is an integer number (164430).

2^2543530 is an apocalyptic number.

2543530 is an abundant number, since it is smaller than the sum of its proper divisors (2718230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2543530 is a wasteful number, since it uses less digits than its factorization.

2543530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 2543530 is about 1594.8448200374. The cubic root of 2543530 is about 136.5040765911.

Adding to 2543530 its reverse (353452), we get a palindrome (2896982).

The spelling of 2543530 in words is "two million, five hundred forty-three thousand, five hundred thirty".