12821982 has 8 divisors (see below), whose sum is σ = 25643976. Its totient is φ = 4273992.

The previous prime is 12821969. The next prime is 12821989. The reversal of 12821982 is 28912821.

It is a sphenic number, since it is the product of 3 distinct primes.

12821982 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821989) 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, 1068493 + ... + 1068504.

It is an arithmetic number, because the mean of its divisors is an integer number (3205497).

Almost surely, 2^12821982 is an apocalyptic number.

12821982 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.

12821982 is a wasteful number, since it uses less digits than its factorization.

12821982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137002.

The product of its digits is 4608, while the sum is 33.

The square root of 12821982 is about 3580.7795240701. The cubic root of 12821982 is about 234.0552503038.

The spelling of 12821982 in words is "twelve million, eight hundred twenty-one thousand, nine hundred eighty-two".