12621611 has 2 divisors, whose sum is σ = 12621612. Its totient is φ = 12621610.

The previous prime is 12621607. The next prime is 12621647. The reversal of 12621611 is 11612621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12621611 - 2² = 12621607 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12621671) 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, 6310805 + 6310806.

It is an arithmetic number, because the mean of its divisors is an integer number (6310806).

Almost surely, 2^12621611 is an apocalyptic number.

12621611 is a deficient number, since it is larger than the sum of its proper divisors (1).

12621611 is an equidigital number, since it uses as much as digits as its factorization.

12621611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The square root of 12621611 is about 3552.6906704637. The cubic root of 12621611 is about 232.8296384032.

The spelling of 12621611 in words is "twelve million, six hundred twenty-one thousand, six hundred eleven".