2543812 has 12 divisors (see below), whose sum is σ = 4713660. Its totient is φ = 1197056.

The previous prime is 2543809. The next prime is 2543813. The reversal of 2543812 is 2183452.

It can be written as a sum of positive squares in 2 ways, for example, as 817216 + 1726596 = 904^2 + 1314^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2543813) 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, 18637 + ... + 18772.

It is an arithmetic number, because the mean of its divisors is an integer number (392805).

2^2543812 is an apocalyptic number.

It is an amenable number.

2543812 is a deficient number, since it is larger than the sum of its proper divisors (2169848).

2543812 is a wasteful number, since it uses less digits than its factorization.

2543812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37430 (or 37428 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 2543812 is about 1594.9332274425. The cubic root of 2543812 is about 136.5091211194.

The spelling of 2543812 in words is "two million, five hundred forty-three thousand, eight hundred twelve".