12821144 has 24 divisors (see below), whose sum is σ = 27965340. Its totient is φ = 5494608.

The previous prime is 12821141. The next prime is 12821153. The reversal of 12821144 is 44112821.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15962 + ... + 16745.

Almost surely, 2^12821144 is an apocalyptic number.

12821144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12821144 is an abundant number, since it is smaller than the sum of its proper divisors (15144196).

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

12821144 is a wasteful number, since it uses less digits than its factorization.

12821144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32727 (or 32716 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

The square root of 12821144 is about 3580.6625085311. The cubic root of 12821144 is about 234.0501511813.

Adding to 12821144 its reverse (44112821), we get a palindrome (56933965).

The spelling of 12821144 in words is "twelve million, eight hundred twenty-one thousand, one hundred forty-four".