1161289 has 2 divisors, whose sum is σ = 1161290. Its totient is φ = 1161288.

The previous prime is 1161269. The next prime is 1161313. The reversal of 1161289 is 9821611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751689 + 409600 = 867^2 + 640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161289 - 2¹¹ = 1159241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580644 + 580645.

It is an arithmetic number, because the mean of its divisors is an integer number (580645).

2^1161289 is an apocalyptic number.

It is an amenable number.

1161289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161289 is an equidigital number, since it uses as much as digits as its factorization.

1161289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 28.

The square root of 1161289 is about 1077.6311985090. The cubic root of 1161289 is about 105.1106618636.

The spelling of 1161289 in words is "one million, one hundred sixty-one thousand, two hundred eighty-nine".