12811843 has 6 divisors (see below), whose sum is σ = 14082572. Its totient is φ = 11647020.

The previous prime is 12811811. The next prime is 12811847. The reversal of 12811843 is 34811821.

It is not a de Polignac number, because 12811843 - 2⁵ = 12811811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12811847) 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 5 ways as a sum of consecutive naturals, for example, 52821 + ... + 53062.

Almost surely, 2^12811843 is an apocalyptic number.

12811843 is a deficient number, since it is larger than the sum of its proper divisors (1270729).

12811843 is a wasteful number, since it uses less digits than its factorization.

12811843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105905 (or 105894 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 12811843 is about 3579.3634909017. The cubic root of 12811843 is about 233.9935408644.

The spelling of 12811843 in words is "twelve million, eight hundred eleven thousand, eight hundred forty-three".