1322689 has 2 divisors, whose sum is σ = 1322690. Its totient is φ = 1322688.

The previous prime is 1322681. The next prime is 1322693. The reversal of 1322689 is 9862231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 11664 = 1145^2 + 108^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322689 - 2³ = 1322681 is a prime.

1322689 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1322689.

It is not a weakly prime, because it can be changed into another prime (1322681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661344 + 661345.

It is an arithmetic number, because the mean of its divisors is an integer number (661345).

2^1322689 is an apocalyptic number.

It is an amenable number.

1322689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322689 is an equidigital number, since it uses as much as digits as its factorization.

1322689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 1322689 is about 1150.0821709774. The cubic root of 1322689 is about 109.7705686305.

The spelling of 1322689 in words is "one million, three hundred twenty-two thousand, six hundred eighty-nine".