12209239 has 8 divisors (see below), whose sum is σ = 14217120. Its totient is φ = 10267296.

The previous prime is 12209233. The next prime is 12209269. The reversal of 12209239 is 93290221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12209239 - 2⁵ = 12209207 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 (12209233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16084 + ... + 16825.

It is an arithmetic number, because the mean of its divisors is an integer number (1777140).

Almost surely, 2^12209239 is an apocalyptic number.

12209239 is a deficient number, since it is larger than the sum of its proper divisors (2007881).

12209239 is an equidigital number, since it uses as much as digits as its factorization.

12209239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32969.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 12209239 is about 3494.1721480202. The cubic root of 12209239 is about 230.2658488660.

Subtracting from 12209239 its sum of digits (28), we obtain a triangular number (12209211 = T₄₉₄₁).

The spelling of 12209239 in words is "twelve million, two hundred nine thousand, two hundred thirty-nine".