12737321 has 4 divisors (see below), whose sum is σ = 12747972. Its totient is φ = 12726672.

The previous prime is 12737317. The next prime is 12737327. The reversal of 12737321 is 12373721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11806096 + 931225 = 3436^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 12737321 - 2² = 12737317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12737327) 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, 3266 + ... + 6011.

It is an arithmetic number, because the mean of its divisors is an integer number (3186993).

Almost surely, 2^12737321 is an apocalyptic number.

It is an amenable number.

12737321 is a deficient number, since it is larger than the sum of its proper divisors (10651).

12737321 is an equidigital number, since it uses as much as digits as its factorization.

12737321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10650.

The product of its digits is 1764, while the sum is 26.

The square root of 12737321 is about 3568.9383575512. The cubic root of 12737321 is about 233.5389722300.

The spelling of 12737321 in words is "twelve million, seven hundred thirty-seven thousand, three hundred twenty-one".