12811839 has 8 divisors (see below), whose sum is σ = 17104560. Its totient is φ = 8530176.

The previous prime is 12811811. The next prime is 12811847. The reversal of 12811839 is 93811821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12811839 - 2⁹ = 12811327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12811889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489 + ... + 5085.

It is an arithmetic number, because the mean of its divisors is an integer number (2138070).

Almost surely, 2^12811839 is an apocalyptic number.

12811839 is a deficient number, since it is larger than the sum of its proper divisors (4292721).

12811839 is an equidigital number, since it uses as much as digits as its factorization.

12811839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5529.

The product of its digits is 3456, while the sum is 33.

The square root of 12811839 is about 3579.3629321431. The cubic root of 12811839 is about 233.9935165126.

The spelling of 12811839 in words is "twelve million, eight hundred eleven thousand, eight hundred thirty-nine".