12323421 has 20 divisors (see below), whose sum is σ = 20084064. Its totient is φ = 7468200.

The previous prime is 12323387. The next prime is 12323429. The reversal of 12323421 is 12432321.

12323421 is digitally balanced in base 2 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 12323421 - 2⁶ = 12323357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12323394 and 12323403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12323429) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6025 + ... + 7806.

Almost surely, 2^12323421 is an apocalyptic number.

12323421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12323421 is a deficient number, since it is larger than the sum of its proper divisors (7760643).

12323421 is a wasteful number, since it uses less digits than its factorization.

12323421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13854 (or 13845 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 12323421 is about 3510.4730450468. The cubic root of 12323421 is about 230.9814456340.

Adding to 12323421 its reverse (12432321), we get a palindrome (24755742).

Subtracting 12323421 from its reverse (12432321), we obtain a square (108900 = 330²).

The spelling of 12323421 in words is "twelve million, three hundred twenty-three thousand, four hundred twenty-one".