12712005 has 64 divisors (see below), whose sum is σ = 24883200. Its totient is φ = 6128640.

The previous prime is 12712003. The next prime is 12712033. The reversal of 12712005 is 50021721.

It is not a de Polignac number, because 12712005 - 2¹ = 12712003 is a prime.

It is a super-2 number, since 2×12712005² = 323190142240050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12712003) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 66460 + ... + 66650.

It is an arithmetic number, because the mean of its divisors is an integer number (388800).

Almost surely, 2^12712005 is an apocalyptic number.

12712005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12712005 is a deficient number, since it is larger than the sum of its proper divisors (12171195).

12712005 is a wasteful number, since it uses less digits than its factorization.

12712005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 12712005 is about 3565.3898805040. The cubic root of 12712005 is about 233.3841465299.

Adding to 12712005 its reverse (50021721), we get a palindrome (62733726).

The spelling of 12712005 in words is "twelve million, seven hundred twelve thousand, five".