12705386 has 4 divisors (see below), whose sum is σ = 19058082. Its totient is φ = 6352692.

The previous prime is 12705377. The next prime is 12705397. The reversal of 12705386 is 68350721.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 9114361 + 3591025 = 3019^2 + 1895^2 .

It is a super-2 number, since 2×12705386² = 322853666817992, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3176345 + ... + 3176348.

Almost surely, 2^12705386 is an apocalyptic number.

12705386 is a deficient number, since it is larger than the sum of its proper divisors (6352696).

12705386 is an equidigital number, since it uses as much as digits as its factorization.

12705386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352695.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 12705386 is about 3564.4615301613. The cubic root of 12705386 is about 233.3436326520.

The spelling of 12705386 in words is "twelve million, seven hundred five thousand, three hundred eighty-six".