12005863 has 4 divisors (see below), whose sum is σ = 12014008. Its totient is φ = 11997720.

The previous prime is 12005857. The next prime is 12005879. The reversal of 12005863 is 36850021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12005863 - 2⁵ = 12005831 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 (12005813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1173 + ... + 5038.

It is an arithmetic number, because the mean of its divisors is an integer number (3003502).

Almost surely, 2^12005863 is an apocalyptic number.

12005863 is a deficient number, since it is larger than the sum of its proper divisors (8145).

12005863 is an equidigital number, since it uses as much as digits as its factorization.

12005863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 12005863 is about 3464.9477629540. The cubic root of 12005863 is about 228.9801283266.

Adding to 12005863 its reverse (36850021), we get a palindrome (48855884).

The spelling of 12005863 in words is "twelve million, five thousand, eight hundred sixty-three".