12209946 has 32 divisors (see below), whose sum is σ = 28331520. Its totient is φ = 3435696.

The previous prime is 12209933. The next prime is 12209947. The reversal of 12209946 is 64990221.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12209947) 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 15 ways as a sum of consecutive naturals, for example, 645 + ... + 4983.

It is an arithmetic number, because the mean of its divisors is an integer number (885360).

Almost surely, 2^12209946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12209946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14165760).

12209946 is an abundant number, since it is smaller than the sum of its proper divisors (16121574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12209946 is a wasteful number, since it uses less digits than its factorization.

12209946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4418.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 12209946 is about 3494.2733150113. The cubic root of 12209946 is about 230.2702934458.

The spelling of 12209946 in words is "twelve million, two hundred nine thousand, nine hundred forty-six".