12722126 has 16 divisors (see below), whose sum is σ = 19826640. Its totient is φ = 6115200.

The previous prime is 12722123. The next prime is 12722131. The reversal of 12722126 is 62122721.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12722123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22985 + ... + 23531.

It is an arithmetic number, because the mean of its divisors is an integer number (1239165).

Almost surely, 2^12722126 is an apocalyptic number.

12722126 is a deficient number, since it is larger than the sum of its proper divisors (7104514).

12722126 is a wasteful number, since it uses less digits than its factorization.

12722126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979.

The product of its digits is 672, while the sum is 23.

The square root of 12722126 is about 3566.8089379724. The cubic root of 12722126 is about 233.4460684257.

Adding to 12722126 its reverse (62122721), we get a palindrome (74844847).

The spelling of 12722126 in words is "twelve million, seven hundred twenty-two thousand, one hundred twenty-six".