12234721 has 4 divisors (see below), whose sum is σ = 12242944. Its totient is φ = 12226500.

The previous prime is 12234697. The next prime is 12234757. The reversal of 12234721 is 12743221.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12234721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12234692 and 12234701.

It is not an unprimeable number, because it can be changed into a prime (12234421) 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, 1185 + ... + 5086.

It is an arithmetic number, because the mean of its divisors is an integer number (3060736).

Almost surely, 2^12234721 is an apocalyptic number.

It is an amenable number.

12234721 is a deficient number, since it is larger than the sum of its proper divisors (8223).

12234721 is an equidigital number, since it uses as much as digits as its factorization.

12234721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8222.

The product of its digits is 672, while the sum is 22.

The square root of 12234721 is about 3497.8166046836. The cubic root of 12234721 is about 230.4259341085.

Adding to 12234721 its reverse (12743221), we get a palindrome (24977942).

It can be divided in two parts, 122 and 34721, that added together give a palindrome (34843).

The spelling of 12234721 in words is "twelve million, two hundred thirty-four thousand, seven hundred twenty-one".