1440314321 has 2 divisors, whose sum is σ = 1440314322. Its totient is φ = 1440314320.

The previous prime is 1440314299. The next prime is 1440314327. The reversal of 1440314321 is 1234130441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748624321 + 691690000 = 27361^2 + 26300^2 .

It is an emirp because it is prime and its reverse (1234130441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1440314321 - 2¹⁸ = 1440052177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440314327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720157160 + 720157161.

It is an arithmetic number, because the mean of its divisors is an integer number (720157161).

Almost surely, 2^1440314321 is an apocalyptic number.

It is an amenable number.

1440314321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440314321 is an equidigital number, since it uses as much as digits as its factorization.

1440314321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1440314321 is about 37951.4732388612. The cubic root of 1440314321 is about 1129.3253918425.

Adding to 1440314321 its reverse (1234130441), we get a palindrome (2674444762).

The spelling of 1440314321 in words is "one billion, four hundred forty million, three hundred fourteen thousand, three hundred twenty-one".