12821706 has 32 divisors (see below), whose sum is σ = 30170880. Its totient is φ = 4022208.

The previous prime is 12821701. The next prime is 12821717. The reversal of 12821706 is 60712821.

It is a super-2 number, since 2×12821706² = 328792289500872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12821706.

It is not an unprimeable number, because it can be changed into a prime (12821701) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6066 + ... + 7901.

It is an arithmetic number, because the mean of its divisors is an integer number (942840).

Almost surely, 2^12821706 is an apocalyptic number.

12821706 is an abundant number, since it is smaller than the sum of its proper divisors (17349174).

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

12821706 is a wasteful number, since it uses less digits than its factorization.

12821706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13995 (or 13989 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 12821706 is about 3580.7409847684. The cubic root of 12821706 is about 234.0535709038.

The spelling of 12821706 in words is "twelve million, eight hundred twenty-one thousand, seven hundred six".