1322289 has 6 divisors (see below), whose sum is σ = 1909986. Its totient is φ = 881520.

The previous prime is 1322287. The next prime is 1322303. The reversal of 1322289 is 9822231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 921600 + 400689 = 960^2 + 633^2 .

It is not a de Polignac number, because 1322289 - 2¹ = 1322287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1322281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73452 + ... + 73469.

It is an arithmetic number, because the mean of its divisors is an integer number (318331).

2^1322289 is an apocalyptic number.

It is an amenable number.

1322289 is a deficient number, since it is larger than the sum of its proper divisors (587697).

1322289 is a wasteful number, since it uses less digits than its factorization.

1322289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146927 (or 146924 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1322289 is about 1149.9082572101. The cubic root of 1322289 is about 109.7595021202.

The spelling of 1322289 in words is "one million, three hundred twenty-two thousand, two hundred eighty-nine".