12712705 has 8 divisors (see below), whose sum is σ = 15505704. Its totient is φ = 10003200.

The previous prime is 12712703. The next prime is 12712727. The reversal of 12712705 is 50721721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 553536 + 12159169 = 744^2 + 3487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12712705 - 2¹ = 12712703 is a prime.

It is a super-2 number, since 2×12712705² = 323225736834050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12712705.

It is not an unprimeable number, because it can be changed into a prime (12712703) 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 7 ways as a sum of consecutive naturals, for example, 20536 + ... + 21145.

It is an arithmetic number, because the mean of its divisors is an integer number (1938213).

Almost surely, 2^12712705 is an apocalyptic number.

It is an amenable number.

12712705 is a deficient number, since it is larger than the sum of its proper divisors (2792999).

12712705 is an equidigital number, since it uses as much as digits as its factorization.

12712705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41747.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 12712705 is about 3565.4880451349. The cubic root of 12712705 is about 233.3884302996.

The spelling of 12712705 in words is "twelve million, seven hundred twelve thousand, seven hundred five".