12734721 has 12 divisors (see below), whose sum is σ = 18628480. Its totient is φ = 8381880.

The previous prime is 12734713. The next prime is 12734749. The reversal of 12734721 is 12743721.

It is a happy number.

It is not a de Polignac number, because 12734721 - 2³ = 12734713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12734621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8245 + ... + 9666.

Almost surely, 2^12734721 is an apocalyptic number.

It is an amenable number.

12734721 is a deficient number, since it is larger than the sum of its proper divisors (5893759).

12734721 is a wasteful number, since it uses less digits than its factorization.

12734721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17996 (or 17993 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 12734721 is about 3568.5740849813. The cubic root of 12734721 is about 233.5230808023.

The spelling of 12734721 in words is "twelve million, seven hundred thirty-four thousand, seven hundred twenty-one".