12898321 has 4 divisors (see below), whose sum is σ = 13577200. Its totient is φ = 12219444.

The previous prime is 12898307. The next prime is 12898339. The reversal of 12898321 is 12389821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12389821 = 17 ⋅728813.

It is a cyclic number.

It is not a de Polignac number, because 12898321 - 2⁵ = 12898289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12898621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339411 + ... + 339448.

It is an arithmetic number, because the mean of its divisors is an integer number (3394300).

Almost surely, 2^12898321 is an apocalyptic number.

It is an amenable number.

12898321 is a deficient number, since it is larger than the sum of its proper divisors (678879).

12898321 is an equidigital number, since it uses as much as digits as its factorization.

12898321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678878.

The product of its digits is 6912, while the sum is 34.

The square root of 12898321 is about 3591.4232554796. The cubic root of 12898321 is about 234.5188344021.

The spelling of 12898321 in words is "twelve million, eight hundred ninety-eight thousand, three hundred twenty-one".