12147871 has 2 divisors, whose sum is σ = 12147872. Its totient is φ = 12147870.

The previous prime is 12147853. The next prime is 12147899. The reversal of 12147871 is 17874121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12147871 - 2⁷ = 12147743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12147271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6073935 + 6073936.

It is an arithmetic number, because the mean of its divisors is an integer number (6073936).

Almost surely, 2^12147871 is an apocalyptic number.

12147871 is a deficient number, since it is larger than the sum of its proper divisors (1).

12147871 is an equidigital number, since it uses as much as digits as its factorization.

12147871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 31.

The square root of 12147871 is about 3485.3796062983. The cubic root of 12147871 is about 229.8794011742.

The spelling of 12147871 in words is "twelve million, one hundred forty-seven thousand, eight hundred seventy-one".