12906239 has 4 divisors (see below), whose sum is σ = 12960480. Its totient is φ = 12852000.

The previous prime is 12906221. The next prime is 12906241. The reversal of 12906239 is 93260921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93260921 = 13 ⋅7173917.

It is a cyclic number.

It is not a de Polignac number, because 12906239 - 2⁸ = 12905983 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 (12906259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26762 + ... + 27239.

It is an arithmetic number, because the mean of its divisors is an integer number (3240120).

Almost surely, 2^12906239 is an apocalyptic number.

12906239 is a deficient number, since it is larger than the sum of its proper divisors (54241).

12906239 is an equidigital number, since it uses as much as digits as its factorization.

12906239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54240.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 12906239 is about 3592.5254348439. The cubic root of 12906239 is about 234.5668132640.

The spelling of 12906239 in words is "twelve million, nine hundred six thousand, two hundred thirty-nine".