12133591 has 4 divisors (see below), whose sum is σ = 12182184. Its totient is φ = 12085000.

The previous prime is 12133577. The next prime is 12133603. The reversal of 12133591 is 19533121.

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 12133591 - 2⁷ = 12133463 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 (12133391) 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, 23920 + ... + 24421.

It is an arithmetic number, because the mean of its divisors is an integer number (3045546).

Almost surely, 2^12133591 is an apocalyptic number.

12133591 is a deficient number, since it is larger than the sum of its proper divisors (48593).

12133591 is an equidigital number, since it uses as much as digits as its factorization.

12133591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48592.

The product of its digits is 810, while the sum is 25.

The square root of 12133591 is about 3483.3304465698. The cubic root of 12133591 is about 229.7892903235.

The spelling of 12133591 in words is "twelve million, one hundred thirty-three thousand, five hundred ninety-one".