12387205 has 8 divisors (see below), whose sum is σ = 15377400. Its totient is φ = 9567936.

The previous prime is 12387149. The next prime is 12387217. The reversal of 12387205 is 50278321.

It can be written as a sum of positive squares in 4 ways, for example, as 3844 + 12383361 = 62^2 + 3519^2 .

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 12387205 - 2⁷ = 12387077 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 42570 + ... + 42859.

It is an arithmetic number, because the mean of its divisors is an integer number (1922175).

Almost surely, 2^12387205 is an apocalyptic number.

It is an amenable number.

12387205 is a deficient number, since it is larger than the sum of its proper divisors (2990195).

12387205 is an equidigital number, since it uses as much as digits as its factorization.

12387205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85463.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 12387205 is about 3519.5461355124. The cubic root of 12387205 is about 231.3792673908.

The spelling of 12387205 in words is "twelve million, three hundred eighty-seven thousand, two hundred five".