12133247 has 4 divisors (see below), whose sum is σ = 13866576. Its totient is φ = 10399920.

The previous prime is 12133243. The next prime is 12133271. The reversal of 12133247 is 74233121.

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

It is a cyclic number.

It is not a de Polignac number, because 12133247 - 2² = 12133243 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 (12133241) 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, 866654 + ... + 866667.

It is an arithmetic number, because the mean of its divisors is an integer number (3466644).

Almost surely, 2^12133247 is an apocalyptic number.

12133247 is a deficient number, since it is larger than the sum of its proper divisors (1733329).

12133247 is an equidigital number, since it uses as much as digits as its factorization.

12133247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733328.

The product of its digits is 1008, while the sum is 23.

The square root of 12133247 is about 3483.2810681884. The cubic root of 12133247 is about 229.7871187141.

Adding to 12133247 its reverse (74233121), we get a palindrome (86366368).

The spelling of 12133247 in words is "twelve million, one hundred thirty-three thousand, two hundred forty-seven".