12230729 has 4 divisors (see below), whose sum is σ = 13977984. Its totient is φ = 10483476.

The previous prime is 12230723. The next prime is 12230731. The reversal of 12230729 is 92703221.

12230729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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: 92703221 = 13 ⋅7131017.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12230729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12230698 and 12230707.

It is not an unprimeable number, because it can be changed into a prime (12230723) 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, 873617 + ... + 873630.

It is an arithmetic number, because the mean of its divisors is an integer number (3494496).

Almost surely, 2^12230729 is an apocalyptic number.

It is an amenable number.

12230729 is a deficient number, since it is larger than the sum of its proper divisors (1747255).

12230729 is an equidigital number, since it uses as much as digits as its factorization.

12230729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747254.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 12230729 is about 3497.2459164320. The cubic root of 12230729 is about 230.4008699110.

The spelling of 12230729 in words is "twelve million, two hundred thirty thousand, seven hundred twenty-nine".