12256705 has 16 divisors (see below), whose sum is σ = 15351120. Its totient is φ = 9382912.

The previous prime is 12256697. The next prime is 12256733. The reversal of 12256705 is 50765221.

It can be written as a sum of positive squares in 8 ways, for example, as 1227664 + 11029041 = 1108^2 + 3321^2 .

It is a cyclic number.

It is not a de Polignac number, because 12256705 - 2³ = 12256697 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19557 + ... + 20173.

It is an arithmetic number, because the mean of its divisors is an integer number (959445).

Almost surely, 2^12256705 is an apocalyptic number.

It is an amenable number.

12256705 is a deficient number, since it is larger than the sum of its proper divisors (3094415).

12256705 is a wasteful number, since it uses less digits than its factorization.

12256705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 12256705 is about 3500.9577261087. The cubic root of 12256705 is about 230.5638654016.

The spelling of 12256705 in words is "twelve million, two hundred fifty-six thousand, seven hundred five".