12149771 has 2 divisors, whose sum is σ = 12149772. Its totient is φ = 12149770.

The previous prime is 12149749. The next prime is 12149783. The reversal of 12149771 is 17794121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12149771 - 2⁶ = 12149707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12149741) 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, 6074885 + 6074886.

It is an arithmetic number, because the mean of its divisors is an integer number (6074886).

Almost surely, 2^12149771 is an apocalyptic number.

12149771 is a deficient number, since it is larger than the sum of its proper divisors (1).

12149771 is an equidigital number, since it uses as much as digits as its factorization.

12149771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 32.

The square root of 12149771 is about 3485.6521627954. The cubic root of 12149771 is about 229.8913853892.

The spelling of 12149771 in words is "twelve million, one hundred forty-nine thousand, seven hundred seventy-one".