1440042343 has 2 divisors, whose sum is σ = 1440042344. Its totient is φ = 1440042342.

The previous prime is 1440042313. The next prime is 1440042367. The reversal of 1440042343 is 3432400441.

It is a strong prime.

It is an emirp because it is prime and its reverse (3432400441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440042343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440042313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720021171 + 720021172.

It is an arithmetic number, because the mean of its divisors is an integer number (720021172).

Almost surely, 2^1440042343 is an apocalyptic number.

1440042343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440042343 is an equidigital number, since it uses as much as digits as its factorization.

1440042343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1440042343 is about 37947.8898359316. The cubic root of 1440042343 is about 1129.2543029622.

Adding to 1440042343 its reverse (3432400441), we get a palindrome (4872442784).

The spelling of 1440042343 in words is "one billion, four hundred forty million, forty-two thousand, three hundred forty-three".