1280883729 has 16 divisors (see below), whose sum is σ = 1719258944. Its totient is φ = 848232000.

The previous prime is 1280883719. The next prime is 1280883763. The reversal of 1280883729 is 9273880821.

It is not a de Polignac number, because 1280883729 - 2⁵ = 1280883697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280883719) 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, 386379 + ... + 389679.

It is an arithmetic number, because the mean of its divisors is an integer number (107453684).

Almost surely, 2^1280883729 is an apocalyptic number.

It is an amenable number.

1280883729 is a deficient number, since it is larger than the sum of its proper divisors (438375215).

1280883729 is a wasteful number, since it uses less digits than its factorization.

1280883729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 1280883729 is about 35789.4359972325. The cubic root of 1280883729 is about 1086.0168651506.

The spelling of 1280883729 in words is "one billion, two hundred eighty million, eight hundred eighty-three thousand, seven hundred twenty-nine".