1040443121 has 8 divisors (see below), whose sum is σ = 1081903080. Its totient is φ = 999355392.

The previous prime is 1040443109. The next prime is 1040443123. The reversal of 1040443121 is 1213440401.

It can be written as a sum of positive squares in 4 ways, for example, as 35236096 + 1005207025 = 5936^2 + 31705^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040443121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1040443093 and 1040443102.

It is not an unprimeable number, because it can be changed into a prime (1040443123) 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 7 ways as a sum of consecutive naturals, for example, 87350 + ... + 98543.

It is an arithmetic number, because the mean of its divisors is an integer number (135237885).

Almost surely, 2^1040443121 is an apocalyptic number.

It is an amenable number.

1040443121 is a deficient number, since it is larger than the sum of its proper divisors (41459959).

1040443121 is a wasteful number, since it uses less digits than its factorization.

1040443121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186115.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1040443121 is about 32255.9005609826. The cubic root of 1040443121 is about 1013.3032783267.

Adding to 1040443121 its reverse (1213440401), we get a palindrome (2253883522).

The spelling of 1040443121 in words is "one billion, forty million, four hundred forty-three thousand, one hundred twenty-one".