12158209 has 8 divisors (see below), whose sum is σ = 13954688. Its totient is φ = 10376640.

The previous prime is 12158203. The next prime is 12158219. The reversal of 12158209 is 90285121.

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 12158209 - 2⁹ = 12157697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12158203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1917 + ... + 5290.

It is an arithmetic number, because the mean of its divisors is an integer number (1744336).

Almost surely, 2^12158209 is an apocalyptic number.

It is an amenable number.

12158209 is a deficient number, since it is larger than the sum of its proper divisors (1796479).

12158209 is an equidigital number, since it uses as much as digits as its factorization.

12158209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12158209 is about 3486.8623431389. The cubic root of 12158209 is about 229.9445928286.

The spelling of 12158209 in words is "twelve million, one hundred fifty-eight thousand, two hundred nine".