12561222 has 8 divisors (see below), whose sum is σ = 25122456. Its totient is φ = 4187072.

The previous prime is 12561221. The next prime is 12561229. The reversal of 12561222 is 22216521.

It is a happy number.

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

12561222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12561221) 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, 1046763 + ... + 1046774.

It is an arithmetic number, because the mean of its divisors is an integer number (3140307).

Almost surely, 2^12561222 is an apocalyptic number.

12561222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12561222 is a wasteful number, since it uses less digits than its factorization.

12561222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093542.

The product of its digits is 480, while the sum is 21.

The square root of 12561222 is about 3544.1814287646. The cubic root of 12561222 is about 232.4577145899.

Adding to 12561222 its reverse (22216521), we get a palindrome (34777743).

The spelling of 12561222 in words is "twelve million, five hundred sixty-one thousand, two hundred twenty-two".