12281422 has 4 divisors (see below), whose sum is σ = 18422136. Its totient is φ = 6140710.

The previous prime is 12281407. The next prime is 12281453. The reversal of 12281422 is 22418221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22418221 = 7 ⋅3202603.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12281393 and 12281402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3070354 + ... + 3070357.

It is an arithmetic number, because the mean of its divisors is an integer number (4605534).

Almost surely, 2^12281422 is an apocalyptic number.

12281422 is a deficient number, since it is larger than the sum of its proper divisors (6140714).

12281422 is an equidigital number, since it uses as much as digits as its factorization.

12281422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140713.

The product of its digits is 512, while the sum is 22.

The square root of 12281422 is about 3504.4859822804. The cubic root of 12281422 is about 230.7187471734.

Adding to 12281422 its reverse (22418221), we get a palindrome (34699643).

The spelling of 12281422 in words is "twelve million, two hundred eighty-one thousand, four hundred twenty-two".