12281152 has 56 divisors (see below), whose sum is σ = 27203400. Its totient is φ = 5462016.

The previous prime is 12281141. The next prime is 12281161. The reversal of 12281152 is 25118221.

It can be written as a sum of positive squares in 4 ways, for example, as 1679616 + 10601536 = 1296^2 + 3256^2 .

It is a nialpdrome in base 16.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 23874 + ... + 24382.

It is an arithmetic number, because the mean of its divisors is an integer number (485775).

Almost surely, 2^12281152 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 12281152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13601700).

12281152 is an abundant number, since it is smaller than the sum of its proper divisors (14922248).

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

12281152 is a wasteful number, since it uses less digits than its factorization.

12281152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563 (or 553 counting only the distinct ones).

The product of its digits is 320, while the sum is 22.

The square root of 12281152 is about 3504.4474600142. The cubic root of 12281152 is about 230.7170564214.

Adding to 12281152 its reverse (25118221), we get a palindrome (37399373).

The spelling of 12281152 in words is "twelve million, two hundred eighty-one thousand, one hundred fifty-two".