12641256 has 24 divisors (see below), whose sum is σ = 34236930. Its totient is φ = 4213728.

The previous prime is 12641249. The next prime is 12641257. The reversal of 12641256 is 65214621.

12641256 is a `hidden beast` number, since 12 + 641 + 2 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12489156 + 152100 = 3534^2 + 390^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (12641257) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 87715 + ... + 87858.

Almost surely, 2^12641256 is an apocalyptic number.

It is an amenable number.

12641256 is an abundant number, since it is smaller than the sum of its proper divisors (21595674).

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

12641256 is a wasteful number, since it uses less digits than its factorization.

12641256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175585 (or 175578 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12641256 is about 3555.4544013389. The cubic root of 12641256 is about 232.9503722580.

Adding to 12641256 its reverse (65214621), we get a palindrome (77855877).

The spelling of 12641256 in words is "twelve million, six hundred forty-one thousand, two hundred fifty-six".