12756340 has 12 divisors (see below), whose sum is σ = 26788356. Its totient is φ = 5102528.

The previous prime is 12756319. The next prime is 12756343. The reversal of 12756340 is 4365721.

It can be written as a sum of positive squares in 2 ways, for example, as 7639696 + 5116644 = 2764^2 + 2262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12756299 and 12756308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12756343) 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 3 ways as a sum of consecutive naturals, for example, 318889 + ... + 318928.

It is an arithmetic number, because the mean of its divisors is an integer number (2232363).

Almost surely, 2^12756340 is an apocalyptic number.

12756340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12756340 is an abundant number, since it is smaller than the sum of its proper divisors (14032016).

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

12756340 is a wasteful number, since it uses less digits than its factorization.

12756340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637826 (or 637824 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 12756340 is about 3571.6018815092. The cubic root of 12756340 is about 233.6551523073.

The spelling of 12756340 in words is "twelve million, seven hundred fifty-six thousand, three hundred forty".