12000005 has 4 divisors (see below), whose sum is σ = 14400012. Its totient is φ = 9600000.

The previous prime is 11999989. The next prime is 12000017. The reversal of 12000005 is 50000021.

12000005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1515361 + 10484644 = 1231^2 + 3238^2 .

It is not a de Polignac number, because 12000005 - 2⁴ = 11999989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11999956 and 12000001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199996 + ... + 1200005.

It is an arithmetic number, because the mean of its divisors is an integer number (3600003).

Almost surely, 2^12000005 is an apocalyptic number.

It is an amenable number.

12000005 is a deficient number, since it is larger than the sum of its proper divisors (2400007).

12000005 is an equidigital number, since it uses as much as digits as its factorization.

12000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400006.

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 12000005 is about 3464.1023368255. The cubic root of 12000005 is about 228.9428803083.

Adding to 12000005 its reverse (50000021), we get a palindrome (62000026).

The spelling of 12000005 in words is "twelve million, five", and thus it is an aban number and an uban number.