12133749 has 4 divisors (see below), whose sum is σ = 16178336. Its totient is φ = 8089164.

The previous prime is 12133747. The next prime is 12133753. The reversal of 12133749 is 94733121.

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.

It is not a de Polignac number, because 12133749 - 2¹ = 12133747 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133747) 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, 2022289 + ... + 2022294.

It is an arithmetic number, because the mean of its divisors is an integer number (4044584).

Almost surely, 2^12133749 is an apocalyptic number.

It is an amenable number.

12133749 is a deficient number, since it is larger than the sum of its proper divisors (4044587).

12133749 is an equidigital number, since it uses as much as digits as its factorization.

12133749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044586.

The product of its digits is 4536, while the sum is 30.

The square root of 12133749 is about 3483.3531259406. The cubic root of 12133749 is about 229.7902877350.

The spelling of 12133749 in words is "twelve million, one hundred thirty-three thousand, seven hundred forty-nine".