12133237 has 4 divisors (see below), whose sum is σ = 12362220. Its totient is φ = 11904256.

The previous prime is 12133217. The next prime is 12133241. The reversal of 12133237 is 73233121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8346321 + 3786916 = 2889^2 + 1946^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12133237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133217) 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, 114412 + ... + 114517.

It is an arithmetic number, because the mean of its divisors is an integer number (3090555).

Almost surely, 2^12133237 is an apocalyptic number.

It is an amenable number.

12133237 is a deficient number, since it is larger than the sum of its proper divisors (228983).

12133237 is an equidigital number, since it uses as much as digits as its factorization.

12133237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228982.

The product of its digits is 756, while the sum is 22.

The square root of 12133237 is about 3483.2796327599. The cubic root of 12133237 is about 229.7870555853.

Adding to 12133237 its reverse (73233121), we get a palindrome (85366358).

The spelling of 12133237 in words is "twelve million, one hundred thirty-three thousand, two hundred thirty-seven".