1123020003 has 16 divisors (see below), whose sum is σ = 1722758400. Its totient is φ = 637417056.

The previous prime is 1123020001. The next prime is 1123020077. The reversal of 1123020003 is 3000203211.

It is a happy number.

It is not a de Polignac number, because 1123020003 - 2¹ = 1123020001 is a prime.

It is a super-2 number, since 2×1123020003² = 2522347854276240018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123020001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176325 + ... + 182582.

It is an arithmetic number, because the mean of its divisors is an integer number (107672400).

Almost surely, 2^1123020003 is an apocalyptic number.

1123020003 is a deficient number, since it is larger than the sum of its proper divisors (599738397).

1123020003 is a wasteful number, since it uses less digits than its factorization.

1123020003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359066.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1123020003 is about 33511.4906114306. The cubic root of 1123020003 is about 1039.4313962204.

Adding to 1123020003 its reverse (3000203211), we get a palindrome (4123223214).

The spelling of 1123020003 in words is "one billion, one hundred twenty-three million, twenty thousand, three".