12281922 has 48 divisors (see below), whose sum is σ = 29029920. Its totient is φ = 3848256.

The previous prime is 12281909. The next prime is 12281947. The reversal of 12281922 is 22918221.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15213 + ... + 15999.

It is an arithmetic number, because the mean of its divisors is an integer number (604790).

Almost surely, 2^12281922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12281922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14514960).

12281922 is an abundant number, since it is smaller than the sum of its proper divisors (16747998).

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

12281922 is a wasteful number, since it uses less digits than its factorization.

12281922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 809 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 12281922 is about 3504.5573186923. The cubic root of 12281922 is about 230.7218781303.

It can be divided in two parts, 12281 and 922, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 12281922 in words is "twelve million, two hundred eighty-one thousand, nine hundred twenty-two".