12821169 has 8 divisors (see below), whose sum is σ = 17271520. Its totient is φ = 8459136.

The previous prime is 12821153. The next prime is 12821227. The reversal of 12821169 is 96112821.

It is a happy number.

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

It is not a de Polignac number, because 12821169 - 2⁴ = 12821153 is a prime.

It is a super-2 number, since 2×12821169² = 328764749053122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12821119) 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, 21739 + ... + 22320.

It is an arithmetic number, because the mean of its divisors is an integer number (2158940).

Almost surely, 2^12821169 is an apocalyptic number.

It is an amenable number.

12821169 is a deficient number, since it is larger than the sum of its proper divisors (4450351).

12821169 is an equidigital number, since it uses as much as digits as its factorization.

12821169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44159.

The product of its digits is 1728, while the sum is 30.

The square root of 12821169 is about 3580.6659995034. The cubic root of 12821169 is about 234.0503033063.

The spelling of 12821169 in words is "twelve million, eight hundred twenty-one thousand, one hundred sixty-nine".