1280460089 has 4 divisors (see below), whose sum is σ = 1301451300. Its totient is φ = 1259468880.

The previous prime is 1280460059. The next prime is 1280460109. The reversal of 1280460089 is 9800640821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9800640821 = 269 ⋅36433609.

It can be written as a sum of positive squares in 2 ways, for example, as 555073600 + 725386489 = 23560^2 + 26933^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280460089 - 2⁸ = 1280459833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280460059) 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 3 ways as a sum of consecutive naturals, for example, 10495514 + ... + 10495635.

It is an arithmetic number, because the mean of its divisors is an integer number (325362825).

Almost surely, 2^1280460089 is an apocalyptic number.

It is an amenable number.

1280460089 is a deficient number, since it is larger than the sum of its proper divisors (20991211).

1280460089 is an equidigital number, since it uses as much as digits as its factorization.

1280460089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20991210.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 1280460089 is about 35783.5170015470. The cubic root of 1280460089 is about 1085.8971220633.

The spelling of 1280460089 in words is "one billion, two hundred eighty million, four hundred sixty thousand, eighty-nine".