1280500705 has 8 divisors (see below), whose sum is σ = 1676291904. Its totient is φ = 931273200.

The previous prime is 1280500693. The next prime is 1280500709. The reversal of 1280500705 is 5070050821.

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

It is not a de Polignac number, because 1280500705 - 2²³ = 1272112097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280500709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11640861 + ... + 11640970.

It is an arithmetic number, because the mean of its divisors is an integer number (209536488).

Almost surely, 2^1280500705 is an apocalyptic number.

It is an amenable number.

1280500705 is a deficient number, since it is larger than the sum of its proper divisors (395791199).

1280500705 is a wasteful number, since it uses less digits than its factorization.

1280500705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23281847.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1280500705 is about 35784.0845209152. The cubic root of 1280500705 is about 1085.9086034393.

The spelling of 1280500705 in words is "one billion, two hundred eighty million, five hundred thousand, seven hundred five".