12781907 has 2 divisors, whose sum is σ = 12781908. Its totient is φ = 12781906.

The previous prime is 12781903. The next prime is 12781919. The reversal of 12781907 is 70918721.

12781907 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12781907 - 2² = 12781903 is a prime.

It is not a weakly prime, because it can be changed into another prime (12781903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6390953 + 6390954.

It is an arithmetic number, because the mean of its divisors is an integer number (6390954).

Almost surely, 2^12781907 is an apocalyptic number.

12781907 is a deficient number, since it is larger than the sum of its proper divisors (1).

12781907 is an equidigital number, since it uses as much as digits as its factorization.

12781907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 12781907 is about 3575.1792962032. The cubic root of 12781907 is about 233.8111498913.

The spelling of 12781907 in words is "twelve million, seven hundred eighty-one thousand, nine hundred seven".