12705749 has 16 divisors (see below), whose sum is σ = 15696000. Its totient is φ = 10245312.

The previous prime is 12705731. The next prime is 12705757. The reversal of 12705749 is 94750721.

It is not a de Polignac number, because 12705749 - 2⁸ = 12705493 is a prime.

It is a super-2 number, since 2×12705749² = 322872115302002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12705349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4742 + ... + 6920.

It is an arithmetic number, because the mean of its divisors is an integer number (981000).

Almost surely, 2^12705749 is an apocalyptic number.

It is an amenable number.

12705749 is a deficient number, since it is larger than the sum of its proper divisors (2990251).

12705749 is an equidigital number, since it uses as much as digits as its factorization.

12705749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217 (or 2203 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 12705749 is about 3564.5124491296. The cubic root of 12705749 is about 233.3458548836.

The spelling of 12705749 in words is "twelve million, seven hundred five thousand, seven hundred forty-nine".