1289117 has 4 divisors (see below), whose sum is σ = 1323996. Its totient is φ = 1254240.

The previous prime is 1289111. The next prime is 1289129. The reversal of 1289117 is 7119821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7119821 = 17 ⋅418813.

It can be written as a sum of positive squares in 2 ways, for example, as 682276 + 606841 = 826^2 + 779^2 .

It is a cyclic number.

It is not a de Polignac number, because 1289117 - 2⁶ = 1289053 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 1289117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289111) 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, 17384 + ... + 17457.

It is an arithmetic number, because the mean of its divisors is an integer number (330999).

2^1289117 is an apocalyptic number.

It is an amenable number.

1289117 is a deficient number, since it is larger than the sum of its proper divisors (34879).

1289117 is an equidigital number, since it uses as much as digits as its factorization.

1289117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34878.

The product of its digits is 1008, while the sum is 29.

The square root of 1289117 is about 1135.3928835430. The cubic root of 1289117 is about 108.8338798846.

The spelling of 1289117 in words is "one million, two hundred eighty-nine thousand, one hundred seventeen".