12333521 has 4 divisors (see below), whose sum is σ = 12401844. Its totient is φ = 12265200.

The previous prime is 12333511. The next prime is 12333523. The reversal of 12333521 is 12533321.

12333521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12533321 = 23 ⋅544927.

It can be written as a sum of positive squares in 2 ways, for example, as 83521 + 12250000 = 289^2 + 3500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12333521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12333493 and 12333502.

It is not an unprimeable number, because it can be changed into a prime (12333523) 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, 33890 + ... + 34251.

It is an arithmetic number, because the mean of its divisors is an integer number (3100461).

Almost surely, 2^12333521 is an apocalyptic number.

It is an amenable number.

12333521 is a deficient number, since it is larger than the sum of its proper divisors (68323).

12333521 is an equidigital number, since it uses as much as digits as its factorization.

12333521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68322.

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

The square root of 12333521 is about 3511.9113029802. The cubic root of 12333521 is about 231.0445308103.

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

The spelling of 12333521 in words is "twelve million, three hundred thirty-three thousand, five hundred twenty-one".