12243549 has 4 divisors (see below), whose sum is σ = 16324736. Its totient is φ = 8162364.

The previous prime is 12243541. The next prime is 12243551. The reversal of 12243549 is 94534221.

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 12243549 - 2³ = 12243541 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 (12243541) 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, 2040589 + ... + 2040594.

It is an arithmetic number, because the mean of its divisors is an integer number (4081184).

Almost surely, 2^12243549 is an apocalyptic number.

It is an amenable number.

12243549 is a deficient number, since it is larger than the sum of its proper divisors (4081187).

12243549 is an equidigital number, since it uses as much as digits as its factorization.

12243549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081186.

The product of its digits is 8640, while the sum is 30.

The square root of 12243549 is about 3499.0783072118. The cubic root of 12243549 is about 230.4813422943.

The spelling of 12243549 in words is "twelve million, two hundred forty-three thousand, five hundred forty-nine".