1296273289 has 8 divisors (see below), whose sum is σ = 1312274880. Its totient is φ = 1280334000.

The previous prime is 1296273287. The next prime is 1296273323. The reversal of 1296273289 is 9823726921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1296273289 - 2¹ = 1296273287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296273283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27004 + ... + 57634.

It is an arithmetic number, because the mean of its divisors is an integer number (164034360).

Almost surely, 2^1296273289 is an apocalyptic number.

It is an amenable number.

1296273289 is a deficient number, since it is larger than the sum of its proper divisors (16001591).

1296273289 is a wasteful number, since it uses less digits than its factorization.

1296273289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31151.

The product of its digits is 653184, while the sum is 49.

The square root of 1296273289 is about 36003.7954804768. The cubic root of 1296273289 is about 1090.3489859721.

The spelling of 1296273289 in words is "one billion, two hundred ninety-six million, two hundred seventy-three thousand, two hundred eighty-nine".