12321005 has 16 divisors (see below), whose sum is σ = 16023744. Its totient is φ = 9058560.

The previous prime is 12320999. The next prime is 12321011. The reversal of 12321005 is 50012321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12320999) and next prime (12321011).

It is not a de Polignac number, because 12321005 - 2⁴ = 12320989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1970 + ... + 5340.

It is an arithmetic number, because the mean of its divisors is an integer number (1001484).

Almost surely, 2^12321005 is an apocalyptic number.

It is an amenable number.

12321005 is a deficient number, since it is larger than the sum of its proper divisors (3702739).

12321005 is a wasteful number, since it uses less digits than its factorization.

12321005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3436.

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

The square root of 12321005 is about 3510.1289150115. The cubic root of 12321005 is about 230.9663500518.

Adding to 12321005 its reverse (50012321), we get a palindrome (62333326).

The spelling of 12321005 in words is "twelve million, three hundred twenty-one thousand, five".