12740256 has 72 divisors (see below), whose sum is σ = 37425024. Its totient is φ = 4106880.

The previous prime is 12740249. The next prime is 12740257. The reversal of 12740256 is 65204721.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (12740257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8215 + ... + 9641.

It is an arithmetic number, because the mean of its divisors is an integer number (519792).

Almost surely, 2^12740256 is an apocalyptic number.

12740256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12740256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18712512).

12740256 is an abundant number, since it is smaller than the sum of its proper divisors (24684768).

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

12740256 is a wasteful number, since it uses less digits than its factorization.

12740256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474 (or 1463 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 12740256 is about 3569.3495205709. The cubic root of 12740256 is about 233.5569086088.

Adding to 12740256 its reverse (65204721), we get a palindrome (77944977).

It can be divided in two parts, 12740 and 256, that added together give a square (12996 = 114²).

The spelling of 12740256 in words is "twelve million, seven hundred forty thousand, two hundred fifty-six".