12581422 has 8 divisors (see below), whose sum is σ = 21568176. Its totient is φ = 5392032.

The previous prime is 12581419. The next prime is 12581423. The reversal of 12581422 is 22418521.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449323 + ... + 449350.

It is an arithmetic number, because the mean of its divisors is an integer number (2696022).

Almost surely, 2^12581422 is an apocalyptic number.

12581422 is a deficient number, since it is larger than the sum of its proper divisors (8986754).

12581422 is an equidigital number, since it uses as much as digits as its factorization.

12581422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898682.

The product of its digits is 1280, while the sum is 25.

The square root of 12581422 is about 3547.0300252465. The cubic root of 12581422 is about 232.5822547825.

Adding to 12581422 its reverse (22418521), we get a palindrome (34999943).

The spelling of 12581422 in words is "twelve million, five hundred eighty-one thousand, four hundred twenty-two".