1217089 has 2 divisors, whose sum is σ = 1217090. Its totient is φ = 1217088.

The previous prime is 1217077. The next prime is 1217093. The reversal of 1217089 is 9807121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 166464 = 1025^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217089 - 2⁵ = 1217057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217009) 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 as a sum of consecutive naturals, namely, 608544 + 608545.

It is an arithmetic number, because the mean of its divisors is an integer number (608545).

2^1217089 is an apocalyptic number.

It is an amenable number.

1217089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217089 is an equidigital number, since it uses as much as digits as its factorization.

1217089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1217089 is about 1103.2175669377. The cubic root of 1217089 is about 106.7679192642.

The spelling of 1217089 in words is "one million, two hundred seventeen thousand, eighty-nine".