12387865 has 8 divisors (see below), whose sum is σ = 16989120. Its totient is φ = 8494512.

The previous prime is 12387853. The next prime is 12387871. The reversal of 12387865 is 56878321.

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 12387865 - 2⁷ = 12387737 is a prime.

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, 176935 + ... + 177004.

It is an arithmetic number, because the mean of its divisors is an integer number (2123640).

Almost surely, 2^12387865 is an apocalyptic number.

It is an amenable number.

12387865 is a deficient number, since it is larger than the sum of its proper divisors (4601255).

12387865 is an equidigital number, since it uses as much as digits as its factorization.

12387865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353951.

The product of its digits is 80640, while the sum is 40.

The square root of 12387865 is about 3519.6398963530. The cubic root of 12387865 is about 231.3833766741.

The spelling of 12387865 in words is "twelve million, three hundred eighty-seven thousand, eight hundred sixty-five".