12705811 has 2 divisors, whose sum is σ = 12705812. Its totient is φ = 12705810.

The previous prime is 12705773. The next prime is 12705829. The reversal of 12705811 is 11850721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12705811 - 2¹¹ = 12703763 is a prime.

It is a super-2 number, since 2×12705811² = 322875266335442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12705841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6352905 + 6352906.

It is an arithmetic number, because the mean of its divisors is an integer number (6352906).

Almost surely, 2^12705811 is an apocalyptic number.

12705811 is a deficient number, since it is larger than the sum of its proper divisors (1).

12705811 is an equidigital number, since it uses as much as digits as its factorization.

12705811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 12705811 is about 3564.5211459606. The cubic root of 12705811 is about 233.3462344341.

The spelling of 12705811 in words is "twelve million, seven hundred five thousand, eight hundred eleven".