12166447 has 2 divisors, whose sum is σ = 12166448. Its totient is φ = 12166446.

The previous prime is 12166439. The next prime is 12166459. The reversal of 12166447 is 74466121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12166447 - 2³ = 12166439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12166547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6083223 + 6083224.

It is an arithmetic number, because the mean of its divisors is an integer number (6083224).

Almost surely, 2^12166447 is an apocalyptic number.

12166447 is a deficient number, since it is larger than the sum of its proper divisors (1).

12166447 is an equidigital number, since it uses as much as digits as its factorization.

12166447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 12166447 is about 3488.0434343626. The cubic root of 12166447 is about 229.9965153851.

The spelling of 12166447 in words is "twelve million, one hundred sixty-six thousand, four hundred forty-seven".