12135729 has 8 divisors (see below), whose sum is σ = 16525440. Its totient is φ = 7918256.

The previous prime is 12135727. The next prime is 12135749. The reversal of 12135729 is 92753121.

12135729 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12135729 - 2¹ = 12135727 is a prime.

It is a super-2 number, since 2×12135729² = 294551836722882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12135696 and 12135705.

It is not an unprimeable number, because it can be changed into a prime (12135727) 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, 42894 + ... + 43175.

It is an arithmetic number, because the mean of its divisors is an integer number (2065680).

Almost surely, 2^12135729 is an apocalyptic number.

It is an amenable number.

12135729 is a deficient number, since it is larger than the sum of its proper divisors (4389711).

12135729 is an equidigital number, since it uses as much as digits as its factorization.

12135729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86119.

The product of its digits is 3780, while the sum is 30.

The square root of 12135729 is about 3483.6373232586. The cubic root of 12135729 is about 229.8027862086.

The spelling of 12135729 in words is "twelve million, one hundred thirty-five thousand, seven hundred twenty-nine".