12012005 has 4 divisors (see below), whose sum is σ = 14414412. Its totient is φ = 9609600.

The previous prime is 12011983. The next prime is 12012017. The reversal of 12012005 is 50021021.

12012005 = 2000² + 2001² + 2002².

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 8797156 + 3214849 = 2966^2 + 1793^2 .

It is not a de Polignac number, because 12012005 - 2⁶ = 12011941 is a prime.

It is a Duffinian number.

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, 1201196 + ... + 1201205.

It is an arithmetic number, because the mean of its divisors is an integer number (3603603).

Almost surely, 2^12012005 is an apocalyptic number.

It is an amenable number.

12012005 is a deficient number, since it is larger than the sum of its proper divisors (2402407).

12012005 is an equidigital number, since it uses as much as digits as its factorization.

12012005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402406.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 12012005 is about 3465.8339544762. The cubic root of 12012005 is about 229.0191691460.

Adding to 12012005 its reverse (50021021), we get a palindrome (62033026).

The spelling of 12012005 in words is "twelve million, twelve thousand, five".