12324721 has 4 divisors (see below), whose sum is σ = 12383344. Its totient is φ = 12266100.

The previous prime is 12324691. The next prime is 12324731. The reversal of 12324721 is 12742321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12324721 - 2⁹ = 12324209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12324692 and 12324701.

It is not an unprimeable number, because it can be changed into a prime (12324731) 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 3 ways as a sum of consecutive naturals, for example, 28995 + ... + 29416.

It is an arithmetic number, because the mean of its divisors is an integer number (3095836).

Almost surely, 2^12324721 is an apocalyptic number.

It is an amenable number.

12324721 is a deficient number, since it is larger than the sum of its proper divisors (58623).

12324721 is an equidigital number, since it uses as much as digits as its factorization.

12324721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58622.

The product of its digits is 672, while the sum is 22.

The square root of 12324721 is about 3510.6582003949. The cubic root of 12324721 is about 230.9895674405.

The spelling of 12324721 in words is "twelve million, three hundred twenty-four thousand, seven hundred twenty-one".