1280160817 has 8 divisors (see below), whose sum is σ = 1415895656. Its totient is φ = 1149748992.

The previous prime is 1280160773. The next prime is 1280160839. The reversal of 1280160817 is 7180610821.

It can be written as a sum of positive squares in 4 ways, for example, as 653109136 + 627051681 = 25556^2 + 25041^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280160817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280160857) 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, 1330248 + ... + 1331209.

It is an arithmetic number, because the mean of its divisors is an integer number (176986957).

Almost surely, 2^1280160817 is an apocalyptic number.

It is an amenable number.

1280160817 is a deficient number, since it is larger than the sum of its proper divisors (135734839).

1280160817 is a wasteful number, since it uses less digits than its factorization.

1280160817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661507.

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 1280160817 is about 35779.3350553081. The cubic root of 1280160817 is about 1085.8125160356.

The spelling of 1280160817 in words is "one billion, two hundred eighty million, one hundred sixty thousand, eight hundred seventeen".