12810729 has 16 divisors (see below), whose sum is σ = 17519040. Its totient is φ = 8324160.

The previous prime is 12810727. The next prime is 12810757. The reversal of 12810729 is 92701821.

It is not a de Polignac number, because 12810729 - 2¹ = 12810727 is a prime.

It is a super-2 number, since 2×12810729² = 328229555022882, 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 = 12810696 and 12810705.

It is not an unprimeable number, because it can be changed into a prime (12810727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27559 + ... + 28019.

It is an arithmetic number, because the mean of its divisors is an integer number (1094940).

Almost surely, 2^12810729 is an apocalyptic number.

It is an amenable number.

12810729 is a deficient number, since it is larger than the sum of its proper divisors (4708311).

12810729 is a wasteful number, since it uses less digits than its factorization.

12810729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 12810729 is about 3579.2078732591. The cubic root of 12810729 is about 233.9867586926.

The spelling of 12810729 in words is "twelve million, eight hundred ten thousand, seven hundred twenty-nine".