1296665159 has 2 divisors, whose sum is σ = 1296665160. Its totient is φ = 1296665158.

The previous prime is 1296665147. The next prime is 1296665207. The reversal of 1296665159 is 9515666921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1296665159 - 2⁴ = 1296665143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296665459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648332579 + 648332580.

It is an arithmetic number, because the mean of its divisors is an integer number (648332580).

Almost surely, 2^1296665159 is an apocalyptic number.

1296665159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296665159 is an equidigital number, since it uses as much as digits as its factorization.

1296665159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 50.

The square root of 1296665159 is about 36009.2371343798. The cubic root of 1296665159 is about 1090.4588475813.

It can be divided in two parts, 12966 and 65159, that added together give a 7-th power (78125 = 5⁷).

The spelling of 1296665159 in words is "one billion, two hundred ninety-six million, six hundred sixty-five thousand, one hundred fifty-nine".