12705756 has 72 divisors (see below), whose sum is σ = 35844480. Its totient is φ = 3430944.

The previous prime is 12705731. The next prime is 12705757. The reversal of 12705756 is 65750721.

It is a super-2 number, since 2×12705756² = 322872471063072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12705757) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30115 + ... + 30533.

It is an arithmetic number, because the mean of its divisors is an integer number (497840).

Almost surely, 2^12705756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12705756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17922240).

12705756 is an abundant number, since it is smaller than the sum of its proper divisors (23138724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12705756 is a wasteful number, since it uses less digits than its factorization.

12705756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 12705756 is about 3564.5134310309. The cubic root of 12705756 is about 233.3458977361.

The spelling of 12705756 in words is "twelve million, seven hundred five thousand, seven hundred fifty-six".