1122643 has 2 divisors, whose sum is σ = 1122644. Its totient is φ = 1122642.

The previous prime is 1122623. The next prime is 1122647. The reversal of 1122643 is 3462211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1122643 - 2⁹ = 1122131 is a prime.

1122643 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1122643.

It is not a weakly prime, because it can be changed into another prime (1122647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561321 + 561322.

It is an arithmetic number, because the mean of its divisors is an integer number (561322).

2^1122643 is an apocalyptic number.

1122643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122643 is an equidigital number, since it uses as much as digits as its factorization.

1122643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 1122643 is about 1059.5484887441. The cubic root of 1122643 is about 103.9315069229.

Adding to 1122643 its reverse (3462211), we get a palindrome (4584854).

The spelling of 1122643 in words is "one million, one hundred twenty-two thousand, six hundred forty-three".