12156047 has 2 divisors, whose sum is σ = 12156048. Its totient is φ = 12156046.

The previous prime is 12156043. The next prime is 12156083. The reversal of 12156047 is 74065121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12156047 - 2² = 12156043 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 (12156043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078023 + 6078024.

It is an arithmetic number, because the mean of its divisors is an integer number (6078024).

Almost surely, 2^12156047 is an apocalyptic number.

12156047 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156047 is an equidigital number, since it uses as much as digits as its factorization.

12156047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 12156047 is about 3486.5523085134. The cubic root of 12156047 is about 229.9309622662.

The spelling of 12156047 in words is "twelve million, one hundred fifty-six thousand, forty-seven".