12281022 has 48 divisors (see below), whose sum is σ = 29597568. Its totient is φ = 3654720.

The previous prime is 12280997. The next prime is 12281029. The reversal of 12281022 is 22018221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12280986 and 12281004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12281029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6408 + ... + 8100.

It is an arithmetic number, because the mean of its divisors is an integer number (616616).

Almost surely, 2^12281022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12281022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14798784).

12281022 is an abundant number, since it is smaller than the sum of its proper divisors (17316546).

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

12281022 is a wasteful number, since it uses less digits than its factorization.

12281022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745 (or 1742 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 12281022 is about 3504.4289121054. The cubic root of 12281022 is about 230.7162423467.

Adding to 12281022 its reverse (22018221), we get a palindrome (34299243).

The spelling of 12281022 in words is "twelve million, two hundred eighty-one thousand, twenty-two".