12821284 has 12 divisors (see below), whose sum is σ = 25642624. Its totient is φ = 5494824.

The previous prime is 12821273. The next prime is 12821287. The reversal of 12821284 is 48212821.

12821284 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 457903 = 12821284 / (1 + 2 + 8 + 2 + 1 + 2 + 8 + 4).

It is not an unprimeable number, because it can be changed into a prime (12821287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228924 + ... + 228979.

Almost surely, 2^12821284 is an apocalyptic number.

12821284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12821284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12821284 is a wasteful number, since it uses less digits than its factorization.

12821284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457914 (or 457912 counting only the distinct ones).

The product of its digits is 2048, while the sum is 28.

The square root of 12821284 is about 3580.6820579325. The cubic root of 12821284 is about 234.0510030788.

It can be divided in two parts, 128 and 21284, that added together give a palindrome (21412).

The spelling of 12821284 in words is "twelve million, eight hundred twenty-one thousand, two hundred eighty-four".