12210442 has 8 divisors (see below), whose sum is σ = 18338976. Its totient is φ = 6097452.

The previous prime is 12210389. The next prime is 12210449. The reversal of 12210442 is 24401221.

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

It is not an unprimeable number, because it can be changed into a prime (12210449) 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, 1668 + ... + 5215.

It is an arithmetic number, because the mean of its divisors is an integer number (2292372).

Almost surely, 2^12210442 is an apocalyptic number.

12210442 is a deficient number, since it is larger than the sum of its proper divisors (6128534).

12210442 is an equidigital number, since it uses as much as digits as its factorization.

12210442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7772.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 12210442 is about 3494.3442875595. The cubic root of 12210442 is about 230.2734114645.

Adding to 12210442 its reverse (24401221), we get a palindrome (36611663).

The spelling of 12210442 in words is "twelve million, two hundred ten thousand, four hundred forty-two".