1296439159 has 4 divisors (see below), whose sum is σ = 1372700304. Its totient is φ = 1220178016.

The previous prime is 1296439139. The next prime is 1296439163. The reversal of 1296439159 is 9519346921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1296439159 - 2²³ = 1288050551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296439129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38130547 + ... + 38130580.

It is an arithmetic number, because the mean of its divisors is an integer number (343175076).

Almost surely, 2^1296439159 is an apocalyptic number.

1296439159 is a deficient number, since it is larger than the sum of its proper divisors (76261145).

1296439159 is an equidigital number, since it uses as much as digits as its factorization.

1296439159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76261144.

The product of its digits is 524880, while the sum is 49.

The square root of 1296439159 is about 36006.0989139340. The cubic root of 1296439159 is about 1090.3954906905.

The spelling of 1296439159 in words is "one billion, two hundred ninety-six million, four hundred thirty-nine thousand, one hundred fifty-nine".