12147205 has 8 divisors (see below), whose sum is σ = 16659072. Its totient is φ = 8329488.

The previous prime is 12147203. The next prime is 12147221. The reversal of 12147205 is 50274121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12147205 - 2¹ = 12147203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12147203) 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 in 7 ways as a sum of consecutive naturals, for example, 173497 + ... + 173566.

It is an arithmetic number, because the mean of its divisors is an integer number (2082384).

Almost surely, 2^12147205 is an apocalyptic number.

It is an amenable number.

12147205 is a deficient number, since it is larger than the sum of its proper divisors (4511867).

12147205 is an equidigital number, since it uses as much as digits as its factorization.

12147205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347075.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 12147205 is about 3485.2840630284. The cubic root of 12147205 is about 229.8752000957.

The spelling of 12147205 in words is "twelve million, one hundred forty-seven thousand, two hundred five".