1280017 has 4 divisors (see below), whose sum is σ = 1284916. Its totient is φ = 1275120.

The previous prime is 1279997. The next prime is 1280023. The reversal of 1280017 is 7100821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 341056 + 938961 = 584^2 + 969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1279976 and 1280003.

It is not an unprimeable number, because it can be changed into a prime (1280317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2034 + ... + 2587.

It is an arithmetic number, because the mean of its divisors is an integer number (321229).

2^1280017 is an apocalyptic number.

It is an amenable number.

1280017 is a deficient number, since it is larger than the sum of its proper divisors (4899).

1280017 is an equidigital number, since it uses as much as digits as its factorization.

1280017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4898.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 1280017 is about 1131.3783628831. The cubic root of 1280017 is about 108.5771853398.

Adding to 1280017 its reverse (7100821), we get a palindrome (8380838).

The spelling of 1280017 in words is "one million, two hundred eighty thousand, seventeen".