12871823 has 4 divisors (see below), whose sum is σ = 12925920. Its totient is φ = 12817728.

The previous prime is 12871811. The next prime is 12871841. The reversal of 12871823 is 32817821.

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

It is a cyclic number.

It is not a de Polignac number, because 12871823 - 2¹⁰ = 12870799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12871823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12871423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26690 + ... + 27167.

It is an arithmetic number, because the mean of its divisors is an integer number (3231480).

Almost surely, 2^12871823 is an apocalyptic number.

12871823 is a deficient number, since it is larger than the sum of its proper divisors (54097).

12871823 is an equidigital number, since it uses as much as digits as its factorization.

12871823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54096.

The product of its digits is 5376, while the sum is 32.

The square root of 12871823 is about 3587.7322921311. The cubic root of 12871823 is about 234.3581276862.

The spelling of 12871823 in words is "twelve million, eight hundred seventy-one thousand, eight hundred twenty-three".