12243739 has 4 divisors (see below), whose sum is σ = 12451320. Its totient is φ = 12036160.

The previous prime is 12243709. The next prime is 12243743. The reversal of 12243739 is 93734221.

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 12243739 - 2⁷ = 12243611 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12243739.

It is not an unprimeable number, because it can be changed into a prime (12243709) 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, 103702 + ... + 103819.

It is an arithmetic number, because the mean of its divisors is an integer number (3112830).

Almost surely, 2^12243739 is an apocalyptic number.

12243739 is a deficient number, since it is larger than the sum of its proper divisors (207581).

12243739 is an equidigital number, since it uses as much as digits as its factorization.

12243739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207580.

The product of its digits is 9072, while the sum is 31.

The square root of 12243739 is about 3499.1054571133. The cubic root of 12243739 is about 230.4825345202.

The spelling of 12243739 in words is "twelve million, two hundred forty-three thousand, seven hundred thirty-nine".