12821346 has 24 divisors (see below), whose sum is σ = 28237404. Its totient is φ = 4203360.

The previous prime is 12821329. The next prime is 12821357. The reversal of 12821346 is 64312821.

It can be written as a sum of positive squares in 2 ways, for example, as 12680721 + 140625 = 3561^2 + 375^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4741 + ... + 6936.

Almost surely, 2^12821346 is an apocalyptic number.

12821346 is an abundant number, since it is smaller than the sum of its proper divisors (15416058).

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

12821346 is a wasteful number, since it uses less digits than its factorization.

12821346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11746 (or 11743 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 12821346 is about 3580.6907154905. The cubic root of 12821346 is about 234.0513803457.

It can be divided in two parts, 1282 and 1346, that added together give a triangular number (2628 = T₇₂).

The spelling of 12821346 in words is "twelve million, eight hundred twenty-one thousand, three hundred forty-six".