1123421023 has 4 divisors (see below), whose sum is σ = 1131996888. Its totient is φ = 1114845160.

The previous prime is 1123421021. The next prime is 1123421029. The reversal of 1123421023 is 3201243211.

It is a happy number.

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 1123421023 - 2¹ = 1123421021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123421021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4287736 + ... + 4287997.

It is an arithmetic number, because the mean of its divisors is an integer number (282999222).

Almost surely, 2^1123421023 is an apocalyptic number.

1123421023 is a deficient number, since it is larger than the sum of its proper divisors (8575865).

1123421023 is an equidigital number, since it uses as much as digits as its factorization.

1123421023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8575864.

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

The square root of 1123421023 is about 33517.4733982143. The cubic root of 1123421023 is about 1039.5551052584. Note that the first 3 decimals are identical.

Adding to 1123421023 its reverse (3201243211), we get a palindrome (4324664234).

The spelling of 1123421023 in words is "one billion, one hundred twenty-three million, four hundred twenty-one thousand, twenty-three".