12722729 has 2 divisors, whose sum is σ = 12722730. Its totient is φ = 12722728.

The previous prime is 12722707. The next prime is 12722737. The reversal of 12722729 is 92722721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11377129 + 1345600 = 3373^2 + 1160^2 .

It is a cyclic number.

It is not a de Polignac number, because 12722729 - 2¹² = 12718633 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12722695 and 12722704.

It is not a weakly prime, because it can be changed into another prime (12725729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6361364 + 6361365.

It is an arithmetic number, because the mean of its divisors is an integer number (6361365).

Almost surely, 2^12722729 is an apocalyptic number.

It is an amenable number.

12722729 is a deficient number, since it is larger than the sum of its proper divisors (1).

12722729 is an equidigital number, since it uses as much as digits as its factorization.

12722729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 12722729 is about 3566.8934663093. The cubic root of 12722729 is about 233.4497566393.

The spelling of 12722729 in words is "twelve million, seven hundred twenty-two thousand, seven hundred twenty-nine".