12407321 has 8 divisors (see below), whose sum is σ = 12924864. Its totient is φ = 11899440.

The previous prime is 12407309. The next prime is 12407333. The reversal of 12407321 is 12370421.

12407321 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12407309) and next prime (12407333).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12407321 is a prime.

It is a super-2 number, since 2×12407321² = 307883228794082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12407293 and 12407302.

It is not an unprimeable number, because it can be changed into a prime (12407221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266 + ... + 4988.

It is an arithmetic number, because the mean of its divisors is an integer number (1615608).

Almost surely, 2^12407321 is an apocalyptic number.

It is an amenable number.

12407321 is a deficient number, since it is larger than the sum of its proper divisors (517543).

12407321 is an equidigital number, since it uses as much as digits as its factorization.

12407321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4831.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 12407321 is about 3522.4027310914. The cubic root of 12407321 is about 231.5044478524.

Adding to 12407321 its reverse (12370421), we get a palindrome (24777742).

The spelling of 12407321 in words is "twelve million, four hundred seven thousand, three hundred twenty-one".