12705726 has 64 divisors (see below), whose sum is σ = 29373696. Its totient is φ = 3659040.

The previous prime is 12705703. The next prime is 12705731. The reversal of 12705726 is 62750721.

It is a super-2 number, since 2×12705726² = 322870946374152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12705693 and 12705702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295461 + ... + 295503.

It is an arithmetic number, because the mean of its divisors is an integer number (458964).

Almost surely, 2^12705726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12705726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14686848).

12705726 is an abundant number, since it is smaller than the sum of its proper divisors (16667970).

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

12705726 is a wasteful number, since it uses less digits than its factorization.

12705726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 12705726 is about 3564.5092228805. The cubic root of 12705726 is about 233.3457140823.

It can be divided in two parts, 12705 and 726, that added together give a palindrome (13431).

The spelling of 12705726 in words is "twelve million, seven hundred five thousand, seven hundred twenty-six".