12343921 has 16 divisors (see below), whose sum is σ = 13754880. Its totient is φ = 11024640.

The previous prime is 12343913. The next prime is 12343927. The reversal of 12343921 is 12934321.

It is a cyclic number.

It is not a de Polignac number, because 12343921 - 2³ = 12343913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12343927) 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 15 ways as a sum of consecutive naturals, for example, 30895 + ... + 31291.

It is an arithmetic number, because the mean of its divisors is an integer number (859680).

Almost surely, 2^12343921 is an apocalyptic number.

It is an amenable number.

12343921 is a deficient number, since it is larger than the sum of its proper divisors (1410959).

12343921 is a wasteful number, since it uses less digits than its factorization.

12343921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504.

The product of its digits is 1296, while the sum is 25.

The square root of 12343921 is about 3513.3916661824. The cubic root of 12343921 is about 231.1094538237.

It can be divided in two parts, 123 and 43921, that added together give a palindrome (44044).

The spelling of 12343921 in words is "twelve million, three hundred forty-three thousand, nine hundred twenty-one".