12149239 has 4 divisors (see below), whose sum is σ = 12163824. Its totient is φ = 12134656.

The previous prime is 12149233. The next prime is 12149257. The reversal of 12149239 is 93294121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93294121 = 419 ⋅222659.

It is a cyclic number.

It is not a de Polignac number, because 12149239 - 2¹³ = 12141047 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 12149239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12149233) 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, 5962 + ... + 7735.

It is an arithmetic number, because the mean of its divisors is an integer number (3040956).

Almost surely, 2^12149239 is an apocalyptic number.

12149239 is a deficient number, since it is larger than the sum of its proper divisors (14585).

12149239 is an equidigital number, since it uses as much as digits as its factorization.

12149239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14584.

The product of its digits is 3888, while the sum is 31.

The square root of 12149239 is about 3485.5758491245. The cubic root of 12149239 is about 229.8880299349. Note that the first 3 decimals are identical.

The spelling of 12149239 in words is "twelve million, one hundred forty-nine thousand, two hundred thirty-nine".