12705645 has 8 divisors (see below), whose sum is σ = 20329056. Its totient is φ = 6776336.

The previous prime is 12705643. The next prime is 12705659. The reversal of 12705645 is 54650721.

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

It is a cyclic number.

It is not a de Polignac number, because 12705645 - 2¹ = 12705643 is a prime.

It is a super-3 number, since 3×12705645³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12705643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423507 + ... + 423536.

It is an arithmetic number, because the mean of its divisors is an integer number (2541132).

Almost surely, 2^12705645 is an apocalyptic number.

12705645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12705645 is a deficient number, since it is larger than the sum of its proper divisors (7623411).

12705645 is an equidigital number, since it uses as much as digits as its factorization.

12705645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847051.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 12705645 is about 3564.4978608494. The cubic root of 12705645 is about 233.3452182155.

The spelling of 12705645 in words is "twelve million, seven hundred five thousand, six hundred forty-five".