1123020043 has 8 divisors (see below), whose sum is σ = 1162598400. Its totient is φ = 1083651240.

The previous prime is 1123020001. The next prime is 1123020077. The reversal of 1123020043 is 3400203211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123020043 - 2⁹ = 1123019531 is a prime.

It is a super-2 number, since 2×1123020043² = 2522348033959443698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123019999 and 1123020026.

It is not an unprimeable number, because it can be changed into a prime (1123020343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41443 + ... + 62956.

It is an arithmetic number, because the mean of its divisors is an integer number (145324800).

Almost surely, 2^1123020043 is an apocalyptic number.

1123020043 is a deficient number, since it is larger than the sum of its proper divisors (39578357).

1123020043 is a wasteful number, since it uses less digits than its factorization.

1123020043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104777.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1123020043 is about 33511.4912082408. The cubic root of 1123020043 is about 1039.4314085613.

Adding to 1123020043 its reverse (3400203211), we get a palindrome (4523223254).

The spelling of 1123020043 in words is "one billion, one hundred twenty-three million, twenty thousand, forty-three".