12863121 has 8 divisors (see below), whose sum is σ = 17441760. Its totient is φ = 8429952.

The previous prime is 12863117. The next prime is 12863173. The reversal of 12863121 is 12136821.

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

It is not a de Polignac number, because 12863121 - 2² = 12863117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12863091 and 12863100.

It is not an unprimeable number, because it can be changed into a prime (12862121) 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, 36160 + ... + 36513.

It is an arithmetic number, because the mean of its divisors is an integer number (2180220).

Almost surely, 2^12863121 is an apocalyptic number.

It is an amenable number.

12863121 is a deficient number, since it is larger than the sum of its proper divisors (4578639).

12863121 is an equidigital number, since it uses as much as digits as its factorization.

12863121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72735.

The product of its digits is 576, while the sum is 24.

The square root of 12863121 is about 3586.5193433188. The cubic root of 12863121 is about 234.3053031516.

Adding to 12863121 its reverse (12136821), we get a palindrome (24999942).

The spelling of 12863121 in words is "twelve million, eight hundred sixty-three thousand, one hundred twenty-one".