12828781 has 8 divisors (see below), whose sum is σ = 15433280. Its totient is φ = 10417248.

The previous prime is 12828769. The next prime is 12828787. The reversal of 12828781 is 18782821.

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

It is a cyclic number.

It is not a de Polignac number, because 12828781 - 2¹¹ = 12826733 is a prime.

It is a super-3 number, since 3×12828781³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12828781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12828787) 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 7 ways as a sum of consecutive naturals, for example, 48096 + ... + 48361.

It is an arithmetic number, because the mean of its divisors is an integer number (1929160).

Almost surely, 2^12828781 is an apocalyptic number.

It is an amenable number.

12828781 is a deficient number, since it is larger than the sum of its proper divisors (2604499).

12828781 is an equidigital number, since it uses as much as digits as its factorization.

12828781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96483.

The product of its digits is 14336, while the sum is 37.

The square root of 12828781 is about 3581.7287725343. The cubic root of 12828781 is about 234.0966131356.

The spelling of 12828781 in words is "twelve million, eight hundred twenty-eight thousand, seven hundred eighty-one".