1280963289 has 8 divisors (see below), whose sum is σ = 1720418400. Its totient is φ = 847741856.

The previous prime is 1280963267. The next prime is 1280963303. The reversal of 1280963289 is 9823690821.

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 1280963289 - 2⁷ = 1280963161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1280963389) 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 7 ways as a sum of consecutive naturals, for example, 1557939 + ... + 1558760.

It is an arithmetic number, because the mean of its divisors is an integer number (215052300).

Almost surely, 2^1280963289 is an apocalyptic number.

It is an amenable number.

1280963289 is a deficient number, since it is larger than the sum of its proper divisors (439455111).

1280963289 is a wasteful number, since it uses less digits than its factorization.

1280963289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3116839.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 1280963289 is about 35790.5474811437. The cubic root of 1280963289 is about 1086.0393500727.

The spelling of 1280963289 in words is "one billion, two hundred eighty million, nine hundred sixty-three thousand, two hundred eighty-nine".