1296672289 has 16 divisors (see below), whose sum is σ = 1456909056. Its totient is φ = 1143676800.

The previous prime is 1296672283. The next prime is 1296672313. The reversal of 1296672289 is 9822766921.

It is a cyclic number.

It is not a de Polignac number, because 1296672289 - 2²⁵ = 1263117857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296672283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145029 + ... + 153709.

It is an arithmetic number, because the mean of its divisors is an integer number (91056816).

Almost surely, 2^1296672289 is an apocalyptic number.

It is an amenable number.

1296672289 is a deficient number, since it is larger than the sum of its proper divisors (160236767).

1296672289 is a wasteful number, since it uses less digits than its factorization.

1296672289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9096.

The product of its digits is 1306368, while the sum is 52.

The square root of 1296672289 is about 36009.3361366188. The cubic root of 1296672289 is about 1090.4608462873.

The spelling of 1296672289 in words is "one billion, two hundred ninety-six million, six hundred seventy-two thousand, two hundred eighty-nine".