1140440321 has 2 divisors, whose sum is σ = 1140440322. Its totient is φ = 1140440320.

The previous prime is 1140440311. The next prime is 1140440351. The reversal of 1140440321 is 1230440411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 770839696 + 369600625 = 27764^2 + 19225^2 .

It is an emirp because it is prime and its reverse (1230440411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1140440321 - 2¹⁸ = 1140178177 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1140440293 and 1140440302.

It is not a weakly prime, because it can be changed into another prime (1140440311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570220160 + 570220161.

It is an arithmetic number, because the mean of its divisors is an integer number (570220161).

Almost surely, 2^1140440321 is an apocalyptic number.

It is an amenable number.

1140440321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140440321 is an equidigital number, since it uses as much as digits as its factorization.

1140440321 is an evil number, because the sum of its binary digits is even.

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

The square root of 1140440321 is about 33770.4059940061. The cubic root of 1140440321 is about 1044.7784061935.

Adding to 1140440321 its reverse (1230440411), we get a palindrome (2370880732).

The spelling of 1140440321 in words is "one billion, one hundred forty million, four hundred forty thousand, three hundred twenty-one".