12642233 has 4 divisors (see below), whose sum is σ = 12713040. Its totient is φ = 12571428.

The previous prime is 12642211. The next prime is 12642263. The reversal of 12642233 is 33224621.

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: 33224621 = 523 ⋅63527.

It is a cyclic number.

It is not a de Polignac number, because 12642233 - 2⁸ = 12641977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12642199 and 12642208.

It is not an unprimeable number, because it can be changed into a prime (12642263) 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, 35135 + ... + 35492.

It is an arithmetic number, because the mean of its divisors is an integer number (3178260).

Almost surely, 2^12642233 is an apocalyptic number.

It is an amenable number.

12642233 is a deficient number, since it is larger than the sum of its proper divisors (70807).

12642233 is an equidigital number, since it uses as much as digits as its factorization.

12642233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70806.

The product of its digits is 1728, while the sum is 23.

The square root of 12642233 is about 3555.5917932181. The cubic root of 12642233 is about 232.9563734194.

Adding to 12642233 its reverse (33224621), we get a palindrome (45866854).

The spelling of 12642233 in words is "twelve million, six hundred forty-two thousand, two hundred thirty-three".