12722537 has 4 divisors (see below), whose sum is σ = 12730500. Its totient is φ = 12714576.

The previous prime is 12722509. The next prime is 12722543. The reversal of 12722537 is 73522721.

12722537 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6651241 + 6071296 = 2579^2 + 2464^2 .

It is a cyclic number.

It is not a de Polignac number, because 12722537 - 2¹⁴ = 12706153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12722737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662 + ... + 5087.

It is an arithmetic number, because the mean of its divisors is an integer number (3182625).

Almost surely, 2^12722537 is an apocalyptic number.

It is an amenable number.

12722537 is a deficient number, since it is larger than the sum of its proper divisors (7963).

12722537 is an equidigital number, since it uses as much as digits as its factorization.

12722537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7962.

The product of its digits is 5880, while the sum is 29.

The square root of 12722537 is about 3566.8665520313. The cubic root of 12722537 is about 233.4485822954.

The spelling of 12722537 in words is "twelve million, seven hundred twenty-two thousand, five hundred thirty-seven".