1440064243 has 2 divisors, whose sum is σ = 1440064244. Its totient is φ = 1440064242.

The previous prime is 1440064217. The next prime is 1440064253. The reversal of 1440064243 is 3424600441.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440064243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440064253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720032121 + 720032122.

It is an arithmetic number, because the mean of its divisors is an integer number (720032122).

Almost surely, 2^1440064243 is an apocalyptic number.

1440064243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440064243 is an equidigital number, since it uses as much as digits as its factorization.

1440064243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 1440064243 is about 37948.1783884286. The cubic root of 1440064243 is about 1129.2600274568.

Adding to 1440064243 its reverse (3424600441), we get a palindrome (4864664684).

The spelling of 1440064243 in words is "one billion, four hundred forty million, sixty-four thousand, two hundred forty-three".