1122143 has 4 divisors (see below), whose sum is σ = 1224168. Its totient is φ = 1020120.

The previous prime is 1122139. The next prime is 1122157. The reversal of 1122143 is 3412211.

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

It is a cyclic number.

It is not a de Polignac number, because 1122143 - 2² = 1122139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50996 + ... + 51017.

It is an arithmetic number, because the mean of its divisors is an integer number (306042).

2^1122143 is an apocalyptic number.

1122143 is a deficient number, since it is larger than the sum of its proper divisors (102025).

1122143 is a wasteful number, since it uses less digits than its factorization.

1122143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102024.

The product of its digits is 48, while the sum is 14.

The square root of 1122143 is about 1059.3125129064. The cubic root of 1122143 is about 103.9160750447.

Adding to 1122143 its reverse (3412211), we get a palindrome (4534354).

The spelling of 1122143 in words is "one million, one hundred twenty-two thousand, one hundred forty-three".