12729326 has 4 divisors (see below), whose sum is σ = 19093992. Its totient is φ = 6364662.

The previous prime is 12729323. The next prime is 12729329. The reversal of 12729326 is 62392721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12729323) and next prime (12729329).

It is a junction number, because it is equal to n+sod(n) for n = 12729292 and 12729301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12729323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3182330 + ... + 3182333.

It is an arithmetic number, because the mean of its divisors is an integer number (4773498).

Almost surely, 2^12729326 is an apocalyptic number.

12729326 is a deficient number, since it is larger than the sum of its proper divisors (6364666).

12729326 is an equidigital number, since it uses as much as digits as its factorization.

12729326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6364665.

The product of its digits is 9072, while the sum is 32.

The square root of 12729326 is about 3567.8181007445. The cubic root of 12729326 is about 233.4900991878.

The spelling of 12729326 in words is "twelve million, seven hundred twenty-nine thousand, three hundred twenty-six".