12442209 has 8 divisors (see below), whose sum is σ = 17865792. Its totient is φ = 7656720.

The previous prime is 12442201. The next prime is 12442217. The reversal of 12442209 is 90224421.

It is an interprime number because it is at equal distance from previous prime (12442201) and next prime (12442217).

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

It is not a de Polignac number, because 12442209 - 2³ = 12442201 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12442201) 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, 159477 + ... + 159554.

It is an arithmetic number, because the mean of its divisors is an integer number (2233224).

Almost surely, 2^12442209 is an apocalyptic number.

It is an amenable number.

12442209 is a deficient number, since it is larger than the sum of its proper divisors (5423583).

12442209 is a wasteful number, since it uses less digits than its factorization.

12442209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319047.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 12442209 is about 3527.3515560545. The cubic root of 12442209 is about 231.7212329988.

The spelling of 12442209 in words is "twelve million, four hundred forty-two thousand, two hundred nine".