2543105 has 4 divisors (see below), whose sum is σ = 3051732. Its totient is φ = 2034480.

The previous prime is 2543059. The next prime is 2543111. The reversal of 2543105 is 5013452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1385329 + 1157776 = 1177^2 + 1076^2 .

It is not a de Polignac number, because 2543105 - 2⁸ = 2542849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254306 + ... + 254315.

It is an arithmetic number, because the mean of its divisors is an integer number (762933).

2^2543105 is an apocalyptic number.

It is an amenable number.

2543105 is a deficient number, since it is larger than the sum of its proper divisors (508627).

2543105 is an equidigital number, since it uses as much as digits as its factorization.

2543105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508626.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2543105 is about 1594.7115726676. The cubic root of 2543105 is about 136.4964733174.

Adding to 2543105 its reverse (5013452), we get a palindrome (7556557).

The spelling of 2543105 in words is "two million, five hundred forty-three thousand, one hundred five".