12239239 has 4 divisors (see below), whose sum is σ = 12278656. Its totient is φ = 12199824.

The previous prime is 12239221. The next prime is 12239251. The reversal of 12239239 is 93293221.

It is a happy number.

12239239 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.

It is a cyclic number.

It is not a de Polignac number, because 12239239 - 2¹⁹ = 11714951 is a prime.

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 12239239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12239639) 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, 19239 + ... + 19864.

It is an arithmetic number, because the mean of its divisors is an integer number (3069664).

Almost surely, 2^12239239 is an apocalyptic number.

12239239 is a deficient number, since it is larger than the sum of its proper divisors (39417).

12239239 is an equidigital number, since it uses as much as digits as its factorization.

12239239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39416.

The product of its digits is 5832, while the sum is 31.

The square root of 12239239 is about 3498.4623765306. The cubic root of 12239239 is about 230.4542942771.

The spelling of 12239239 in words is "twelve million, two hundred thirty-nine thousand, two hundred thirty-nine".