12821994 has 24 divisors (see below), whose sum is σ = 28989792. Its totient is φ = 4088040.

The previous prime is 12821989. The next prime is 12822001. The reversal of 12821994 is 49912821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15072 + ... + 15899.

It is an arithmetic number, because the mean of its divisors is an integer number (1207908).

Almost surely, 2^12821994 is an apocalyptic number.

12821994 is an abundant number, since it is smaller than the sum of its proper divisors (16167798).

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

12821994 is a wasteful number, since it uses less digits than its factorization.

12821994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31002 (or 30999 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 12821994 is about 3580.7811996825. The cubic root of 12821994 is about 234.0553233207.

It can be divided in two parts, 128 and 21994, that added together give a palindrome (22122).

The spelling of 12821994 in words is "twelve million, eight hundred twenty-one thousand, nine hundred ninety-four".