12055811 has 2 divisors, whose sum is σ = 12055812. Its totient is φ = 12055810.

The previous prime is 12055801. The next prime is 12055837. The reversal of 12055811 is 11855021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12055811 - 2¹⁸ = 11793667 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12055801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6027905 + 6027906.

It is an arithmetic number, because the mean of its divisors is an integer number (6027906).

Almost surely, 2^12055811 is an apocalyptic number.

12055811 is a deficient number, since it is larger than the sum of its proper divisors (1).

12055811 is an equidigital number, since it uses as much as digits as its factorization.

12055811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 12055811 is about 3472.1478943156. The cubic root of 12055811 is about 229.2972310459.

The spelling of 12055811 in words is "twelve million, fifty-five thousand, eight hundred eleven".