12005321 has 4 divisors (see below), whose sum is σ = 12637200. Its totient is φ = 11373444.

The previous prime is 12005317. The next prime is 12005327. The reversal of 12005321 is 12350021.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12350021 = 163 ⋅75767.

It is a cyclic number.

It is not a de Polignac number, because 12005321 - 2² = 12005317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12005296 and 12005305.

It is not an unprimeable number, because it can be changed into a prime (12005327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315911 + ... + 315948.

It is an arithmetic number, because the mean of its divisors is an integer number (3159300).

Almost surely, 2^12005321 is an apocalyptic number.

It is an amenable number.

12005321 is a deficient number, since it is larger than the sum of its proper divisors (631879).

12005321 is an equidigital number, since it uses as much as digits as its factorization.

12005321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631878.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 12005321 is about 3464.8695502140. The cubic root of 12005321 is about 228.9766825352.

Adding to 12005321 its reverse (12350021), we get a palindrome (24355342).

The spelling of 12005321 in words is "twelve million, five thousand, three hundred twenty-one".