12705634 has 4 divisors (see below), whose sum is σ = 19058454. Its totient is φ = 6352816.

The previous prime is 12705631. The next prime is 12705643. The reversal of 12705634 is 43650721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43650721 = 239 ⋅182639.

It can be written as a sum of positive squares in only one way, i.e., 9272025 + 3433609 = 3045^2 + 1853^2 .

It is a super-3 number, since 3×12705634³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12705631) by changing a digit.

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, 3176407 + ... + 3176410.

Almost surely, 2^12705634 is an apocalyptic number.

12705634 is a deficient number, since it is larger than the sum of its proper divisors (6352820).

12705634 is an equidigital number, since it uses as much as digits as its factorization.

12705634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352819.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 12705634 is about 3564.4963178547. The cubic root of 12705634 is about 233.3451508754.

The spelling of 12705634 in words is "twelve million, seven hundred five thousand, six hundred thirty-four".