12298721 has 12 divisors (see below), whose sum is σ = 13086192. Its totient is φ = 11555016.

The previous prime is 12298717. The next prime is 12298739. The reversal of 12298721 is 12789221.

It is a happy number.

12298721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12298721 - 2² = 12298717 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12298711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35270 + ... + 35616.

It is an arithmetic number, because the mean of its divisors is an integer number (1090516).

Almost surely, 2^12298721 is an apocalyptic number.

It is an amenable number.

12298721 is a deficient number, since it is larger than the sum of its proper divisors (787471).

12298721 is an equidigital number, since it uses as much as digits as its factorization.

12298721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 437 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 12298721 is about 3506.9532360726. The cubic root of 12298721 is about 230.8270226683.

The spelling of 12298721 in words is "twelve million, two hundred ninety-eight thousand, seven hundred twenty-one".