12622681 has 2 divisors, whose sum is σ = 12622682. Its totient is φ = 12622680.

The previous prime is 12622679. The next prime is 12622739. The reversal of 12622681 is 18622621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12187081 + 435600 = 3491^2 + 660^2 .

It is a cyclic number.

It is not a de Polignac number, because 12622681 - 2¹ = 12622679 is a prime.

It is a super-2 number, since 2×12622681² = 318664151255522, which contains 22 as substring.

Together with 12622679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12622601) 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 as a sum of consecutive naturals, namely, 6311340 + 6311341.

It is an arithmetic number, because the mean of its divisors is an integer number (6311341).

Almost surely, 2^12622681 is an apocalyptic number.

It is an amenable number.

12622681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12622681 is an equidigital number, since it uses as much as digits as its factorization.

12622681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 12622681 is about 3552.8412573601. The cubic root of 12622681 is about 232.8362176128.

The spelling of 12622681 in words is "twelve million, six hundred twenty-two thousand, six hundred eighty-one".