1289329 has 2 divisors, whose sum is σ = 1289330. Its totient is φ = 1289328.

The previous prime is 1289303. The next prime is 1289333. The reversal of 1289329 is 9239821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 898704 + 390625 = 948^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1289329 - 2⁹ = 1288817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1289294 and 1289303.

It is not a weakly prime, because it can be changed into another prime (1289129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644664 + 644665.

It is an arithmetic number, because the mean of its divisors is an integer number (644665).

2^1289329 is an apocalyptic number.

It is an amenable number.

1289329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289329 is an equidigital number, since it uses as much as digits as its factorization.

1289329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 1289329 is about 1135.4862394587. The cubic root of 1289329 is about 108.8398456006.

The spelling of 1289329 in words is "one million, two hundred eighty-nine thousand, three hundred twenty-nine".