2543345 has 16 divisors (see below), whose sum is σ = 3561600. Its totient is φ = 1742832.

The previous prime is 2543341. The next prime is 2543351. The reversal of 2543345 is 5433452.

It is not a de Polignac number, because 2543345 - 2² = 2543341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2543341) 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, 974 + ... + 2456.

It is an arithmetic number, because the mean of its divisors is an integer number (222600).

2^2543345 is an apocalyptic number.

It is an amenable number.

2543345 is a deficient number, since it is larger than the sum of its proper divisors (1018255).

2543345 is an equidigital number, since it uses as much as digits as its factorization.

2543345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509 (or 1495 counting only the distinct ones).

The product of its digits is 7200, while the sum is 26.

The square root of 2543345 is about 1594.7868196094. The cubic root of 2543345 is about 136.5007670349.

Adding to 2543345 its reverse (5433452), we get a palindrome (7976797).

The spelling of 2543345 in words is "two million, five hundred forty-three thousand, three hundred forty-five".