12672005 has 4 divisors (see below), whose sum is σ = 15206412. Its totient is φ = 10137600.

The previous prime is 12671969. The next prime is 12672007. The reversal of 12672005 is 50027621.

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 8567329 + 4104676 = 2927^2 + 2026^2 .

It is not a de Polignac number, because 12672005 - 2²² = 8477701 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 (12672007) 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, 1267196 + ... + 1267205.

It is an arithmetic number, because the mean of its divisors is an integer number (3801603).

Almost surely, 2^12672005 is an apocalyptic number.

It is an amenable number.

12672005 is a deficient number, since it is larger than the sum of its proper divisors (2534407).

12672005 is an equidigital number, since it uses as much as digits as its factorization.

12672005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534406.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 12672005 is about 3559.7759760974. The cubic root of 12672005 is about 233.1390979933.

Adding to 12672005 its reverse (50027621), we get a palindrome (62699626).

The spelling of 12672005 in words is "twelve million, six hundred seventy-two thousand, five".