1280732065 has 8 divisors (see below), whose sum is σ = 1542310848. Its totient is φ = 1020964080.

The previous prime is 1280732021. The next prime is 1280732153. The reversal of 1280732065 is 5602370821.

It is a happy number.

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

It is not a de Polignac number, because 1280732065 - 2¹⁵ = 1280699297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1280732065.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451141 + ... + 453970.

It is an arithmetic number, because the mean of its divisors is an integer number (192788856).

Almost surely, 2^1280732065 is an apocalyptic number.

It is an amenable number.

1280732065 is a deficient number, since it is larger than the sum of its proper divisors (261578783).

1280732065 is an equidigital number, since it uses as much as digits as its factorization.

1280732065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905399.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1280732065 is about 35787.3170969828. The cubic root of 1280732065 is about 1085.9739999111.

The spelling of 1280732065 in words is "one billion, two hundred eighty million, seven hundred thirty-two thousand, sixty-five".