12722722 has 4 divisors (see below), whose sum is σ = 19084086. Its totient is φ = 6361360.

The previous prime is 12722707. The next prime is 12722729. The reversal of 12722722 is 22722721.

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., 12538681 + 184041 = 3541^2 + 429^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12722729) 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 as a sum of consecutive naturals, namely, 3180679 + ... + 3180682.

Almost surely, 2^12722722 is an apocalyptic number.

12722722 is a deficient number, since it is larger than the sum of its proper divisors (6361364).

12722722 is an equidigital number, since it uses as much as digits as its factorization.

12722722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6361363.

The product of its digits is 1568, while the sum is 25.

The square root of 12722722 is about 3566.8924850632. The cubic root of 12722722 is about 233.4497138249.

Subtracting 12722722 from its reverse (22722721), we obtain a palindrome (9999999).

The spelling of 12722722 in words is "twelve million, seven hundred twenty-two thousand, seven hundred twenty-two".