1296065671 has 2 divisors, whose sum is σ = 1296065672. Its totient is φ = 1296065670.

The previous prime is 1296065647. The next prime is 1296065717. The reversal of 1296065671 is 1765606921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1296065671 - 2⁷ = 1296065543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296065371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648032835 + 648032836.

It is an arithmetic number, because the mean of its divisors is an integer number (648032836).

Almost surely, 2^1296065671 is an apocalyptic number.

1296065671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296065671 is an equidigital number, since it uses as much as digits as its factorization.

1296065671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1296065671 is about 36000.9120856681. The cubic root of 1296065671 is about 1090.2907708399.

The spelling of 1296065671 in words is "one billion, two hundred ninety-six million, sixty-five thousand, six hundred seventy-one".