12239749 has 4 divisors (see below), whose sum is σ = 12771936. Its totient is φ = 11707564.

The previous prime is 12239741. The next prime is 12239753. The reversal of 12239749 is 94793221.

12239749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 12239749 - 2³ = 12239741 is a prime.

It is a super-2 number, since 2×12239749² = 299622911166002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12239741) 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, 266059 + ... + 266104.

It is an arithmetic number, because the mean of its divisors is an integer number (3192984).

Almost surely, 2^12239749 is an apocalyptic number.

It is an amenable number.

12239749 is a deficient number, since it is larger than the sum of its proper divisors (532187).

12239749 is an equidigital number, since it uses as much as digits as its factorization.

12239749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532186.

The product of its digits is 27216, while the sum is 37.

The square root of 12239749 is about 3498.5352649359. The cubic root of 12239749 is about 230.4574951857.

The spelling of 12239749 in words is "twelve million, two hundred thirty-nine thousand, seven hundred forty-nine".