1122003 has 12 divisors (see below), whose sum is σ = 1648920. Its totient is φ = 734976.

The previous prime is 1122001. The next prime is 1122029. The reversal of 1122003 is 3002211.

It is a happy number.

It is not a de Polignac number, because 1122003 - 2¹ = 1122001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1122001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 526 + ... + 1587.

It is an arithmetic number, because the mean of its divisors is an integer number (137410).

2^1122003 is an apocalyptic number.

1122003 is a deficient number, since it is larger than the sum of its proper divisors (526917).

1122003 is a wasteful number, since it uses less digits than its factorization.

1122003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178 (or 2175 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1122003 is about 1059.2464302512. The cubic root of 1122003 is about 103.9117532974.

Adding to 1122003 its reverse (3002211), we get a palindrome (4124214).

The spelling of 1122003 in words is "one million, one hundred twenty-two thousand, three".