12828121 has 8 divisors (see below), whose sum is σ = 13595400. Its totient is φ = 12082560.

The previous prime is 12828119. The next prime is 12828139. The reversal of 12828121 is 12182821.

It can be written as a sum of positive squares in 4 ways, for example, as 126025 + 12702096 = 355^2 + 3564^2 .

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

It is not a de Polignac number, because 12828121 - 2¹ = 12828119 is a prime.

It is a super-3 number, since 3×12828121³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12828161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4206 + ... + 6583.

It is an arithmetic number, because the mean of its divisors is an integer number (1699425).

Almost surely, 2^12828121 is an apocalyptic number.

It is an amenable number.

12828121 is a deficient number, since it is larger than the sum of its proper divisors (767279).

12828121 is a wasteful number, since it uses less digits than its factorization.

12828121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10859.

The product of its digits is 512, while the sum is 25.

The square root of 12828121 is about 3581.6366370697. The cubic root of 12828121 is about 234.0925985579.

The spelling of 12828121 in words is "twelve million, eight hundred twenty-eight thousand, one hundred twenty-one".