12533321 has 4 divisors (see below), whose sum is σ = 13078272. Its totient is φ = 11988372.

The previous prime is 12533317. The next prime is 12533327. The reversal of 12533321 is 12333521.

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: 12333521 = 181 ⋅68141.

It is a cyclic number.

It is not a de Polignac number, because 12533321 - 2² = 12533317 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 12533293 and 12533302.

It is not an unprimeable number, because it can be changed into a prime (12533327) 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, 272441 + ... + 272486.

It is an arithmetic number, because the mean of its divisors is an integer number (3269568).

Almost surely, 2^12533321 is an apocalyptic number.

It is an amenable number.

12533321 is a deficient number, since it is larger than the sum of its proper divisors (544951).

12533321 is an equidigital number, since it uses as much as digits as its factorization.

12533321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544950.

The product of its digits is 540, while the sum is 20.

The square root of 12533321 is about 3540.2430707509. The cubic root of 12533321 is about 232.2854752245.

Adding to 12533321 its reverse (12333521), we get a palindrome (24866842).

The spelling of 12533321 in words is "twelve million, five hundred thirty-three thousand, three hundred twenty-one".