12729274 has 4 divisors (see below), whose sum is σ = 19093914. Its totient is φ = 6364636.

The previous prime is 12729271. The next prime is 12729293. The reversal of 12729274 is 47292721.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 11390625 + 1338649 = 3375^2 + 1157^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12729271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3182317 + ... + 3182320.

Almost surely, 2^12729274 is an apocalyptic number.

12729274 is a deficient number, since it is larger than the sum of its proper divisors (6364640).

12729274 is an equidigital number, since it uses as much as digits as its factorization.

12729274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6364639.

The product of its digits is 14112, while the sum is 34.

The square root of 12729274 is about 3567.8108133700. The cubic root of 12729274 is about 233.4897812474.

The spelling of 12729274 in words is "twelve million, seven hundred twenty-nine thousand, two hundred seventy-four".