12343821 has 16 divisors (see below), whose sum is σ = 19459200. Its totient is φ = 6810048.

The previous prime is 12343817. The next prime is 12343861. The reversal of 12343821 is 12834321.

12343821 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12343821 - 2² = 12343817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12343791 and 12343800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12343861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9526 + ... + 10743.

It is an arithmetic number, because the mean of its divisors is an integer number (1216200).

Almost surely, 2^12343821 is an apocalyptic number.

It is an amenable number.

12343821 is a deficient number, since it is larger than the sum of its proper divisors (7115379).

12343821 is a wasteful number, since it uses less digits than its factorization.

12343821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20308.

The product of its digits is 1152, while the sum is 24.

The square root of 12343821 is about 3513.3774348908. The cubic root of 12343821 is about 231.1088297376.

The spelling of 12343821 in words is "twelve million, three hundred forty-three thousand, eight hundred twenty-one".