1440024161 has 2 divisors, whose sum is σ = 1440024162. Its totient is φ = 1440024160.

The previous prime is 1440024139. The next prime is 1440024163. The reversal of 1440024161 is 1614200441.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1407750400 + 32273761 = 37520^2 + 5681^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440024161 - 2⁶ = 1440024097 is a prime.

It is a Sophie Germain prime.

Together with 1440024163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1440024163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720012080 + 720012081.

It is an arithmetic number, because the mean of its divisors is an integer number (720012081).

Almost surely, 2^1440024161 is an apocalyptic number.

It is an amenable number.

1440024161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440024161 is an equidigital number, since it uses as much as digits as its factorization.

1440024161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1440024161 is about 37947.6502698125. The cubic root of 1440024161 is about 1129.2495502807.

The spelling of 1440024161 in words is "one billion, four hundred forty million, twenty-four thousand, one hundred sixty-one".