12729130 has 8 divisors (see below), whose sum is σ = 22912452. Its totient is φ = 5091648.

The previous prime is 12729113. The next prime is 12729133. The reversal of 12729130 is 3192721.

It can be written as a sum of positive squares in 2 ways, for example, as 11607649 + 1121481 = 3407^2 + 1059^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12729095 and 12729104.

It is not an unprimeable number, because it can be changed into a prime (12729133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636447 + ... + 636466.

Almost surely, 2^12729130 is an apocalyptic number.

12729130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12729130 is a deficient number, since it is larger than the sum of its proper divisors (10183322).

12729130 is a wasteful number, since it uses less digits than its factorization.

12729130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272920.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 12729130 is about 3567.7906328707. The cubic root of 12729130 is about 233.4889007925.

The spelling of 12729130 in words is "twelve million, seven hundred twenty-nine thousand, one hundred thirty".