12281904 has 90 divisors (see below), whose sum is σ = 36729420. Its totient is φ = 3820608.

The previous prime is 12281881. The next prime is 12281909. The reversal of 12281904 is 40918221.

It is not an unprimeable number, because it can be changed into a prime (12281909) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 183279 + ... + 183345.

Almost surely, 2^12281904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12281904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18364710).

12281904 is an abundant number, since it is smaller than the sum of its proper divisors (24447516).

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

12281904 is a wasteful number, since it uses less digits than its factorization.

12281904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 91 counting only the distinct ones).

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

The square root of 12281904 is about 3504.5547506067. The cubic root of 12281904 is about 230.7217654173.

The spelling of 12281904 in words is "twelve million, two hundred eighty-one thousand, nine hundred four".