1122641 has 4 divisors (see below), whose sum is σ = 1209012. Its totient is φ = 1036272.

The previous prime is 1122623. The next prime is 1122643. The reversal of 1122641 is 1462211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 450241 + 672400 = 671^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122641 - 2¹⁴ = 1106257 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122643) 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 in 3 ways as a sum of consecutive naturals, for example, 43166 + ... + 43191.

It is an arithmetic number, because the mean of its divisors is an integer number (302253).

2^1122641 is an apocalyptic number.

It is an amenable number.

1122641 is a deficient number, since it is larger than the sum of its proper divisors (86371).

1122641 is an equidigital number, since it uses as much as digits as its factorization.

1122641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86370.

The product of its digits is 96, while the sum is 17.

The square root of 1122641 is about 1059.5475449455. The cubic root of 1122641 is about 103.9314452045.

Adding to 1122641 its reverse (1462211), we get a palindrome (2584852).

The spelling of 1122641 in words is "one million, one hundred twenty-two thousand, six hundred forty-one".