12722427 has 20 divisors (see below), whose sum is σ = 19834320. Its totient is φ = 8111664.

The previous prime is 12722417. The next prime is 12722447. The reversal of 12722427 is 72422721.

It is not a de Polignac number, because 12722427 - 2¹⁹ = 12198139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12722427.

It is not an unprimeable number, because it can be changed into a prime (12722417) 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 19 ways as a sum of consecutive naturals, for example, 1552 + ... + 5277.

It is an arithmetic number, because the mean of its divisors is an integer number (991716).

Almost surely, 2^12722427 is an apocalyptic number.

12722427 is a deficient number, since it is larger than the sum of its proper divisors (7111893).

12722427 is an equidigital number, since it uses as much as digits as its factorization.

12722427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6864 (or 6855 counting only the distinct ones).

The product of its digits is 3136, while the sum is 27.

The square root of 12722427 is about 3566.8511323014. The cubic root of 12722427 is about 233.4479094889.

The spelling of 12722427 in words is "twelve million, seven hundred twenty-two thousand, four hundred twenty-seven".