1040344321 has 2 divisors, whose sum is σ = 1040344322. Its totient is φ = 1040344320.

The previous prime is 1040344313. The next prime is 1040344363. The reversal of 1040344321 is 1234430401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1022400625 + 17943696 = 31975^2 + 4236^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040344321 - 2³ = 1040344313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1040344292 and 1040344301.

It is not a weakly prime, because it can be changed into another prime (1040344391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520172160 + 520172161.

It is an arithmetic number, because the mean of its divisors is an integer number (520172161).

Almost surely, 2^1040344321 is an apocalyptic number.

It is an amenable number.

1040344321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040344321 is an equidigital number, since it uses as much as digits as its factorization.

1040344321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1040344321 is about 32254.3690218860. The cubic root of 1040344321 is about 1013.2712030404.

Adding to 1040344321 its reverse (1234430401), we get a palindrome (2274774722).

The spelling of 1040344321 in words is "one billion, forty million, three hundred forty-four thousand, three hundred twenty-one".