1123040321 has 6 divisors (see below), whose sum is σ = 1216073430. Its totient is φ = 1036652448.

The previous prime is 1123040291. The next prime is 1123040327. The reversal of 1123040321 is 1230403211.

It can be written as a sum of positive squares in 3 ways, for example, as 790321 + 1122250000 = 889^2 + 33500^2 .

It is not a de Polignac number, because 1123040321 - 2⁶ = 1123040257 is a prime.

It is a super-2 number, since 2×1123040321² = 2522439125183566082, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123040321.

It is not an unprimeable number, because it can be changed into a prime (1123040327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3322436 + ... + 3322773.

It is an arithmetic number, because the mean of its divisors is an integer number (202678905).

Almost surely, 2^1123040321 is an apocalyptic number.

It is an amenable number.

1123040321 is a deficient number, since it is larger than the sum of its proper divisors (93033109).

1123040321 is an equidigital number, since it uses as much as digits as its factorization.

1123040321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6645235 (or 6645222 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1123040321 is about 33511.7937598094. The cubic root of 1123040321 is about 1039.4376647462.

Adding to 1123040321 its reverse (1230403211), we get a palindrome (2353443532).

The spelling of 1123040321 in words is "one billion, one hundred twenty-three million, forty thousand, three hundred twenty-one".