1440422561 has 2 divisors, whose sum is σ = 1440422562. Its totient is φ = 1440422560.

The previous prime is 1440422539. The next prime is 1440422567. The reversal of 1440422561 is 1652240441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1106227600 + 334194961 = 33260^2 + 18281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440422561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440422567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720211280 + 720211281.

It is an arithmetic number, because the mean of its divisors is an integer number (720211281).

Almost surely, 2^1440422561 is an apocalyptic number.

It is an amenable number.

1440422561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440422561 is an equidigital number, since it uses as much as digits as its factorization.

1440422561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 1440422561 is about 37952.8992436678. The cubic root of 1440422561 is about 1129.3536808339.

The spelling of 1440422561 in words is "one billion, four hundred forty million, four hundred twenty-two thousand, five hundred sixty-one".