12781308 has 12 divisors (see below), whose sum is σ = 29823080. Its totient is φ = 4260432.

The previous prime is 12781303. The next prime is 12781313. The reversal of 12781308 is 80318721.

It is a happy number.

12781308 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12781303) and next prime (12781313).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12781303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532543 + ... + 532566.

Almost surely, 2^12781308 is an apocalyptic number.

It is an amenable number.

12781308 is an abundant number, since it is smaller than the sum of its proper divisors (17041772).

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

12781308 is a wasteful number, since it uses less digits than its factorization.

12781308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065116 (or 1065114 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 12781308 is about 3575.0955231993. The cubic root of 12781308 is about 233.8074974612.

The spelling of 12781308 in words is "twelve million, seven hundred eighty-one thousand, three hundred eight".