1442266561 has 2 divisors, whose sum is σ = 1442266562. Its totient is φ = 1442266560.

The previous prime is 1442266531. The next prime is 1442266577. The reversal of 1442266561 is 1656622441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1263375936 + 178890625 = 35544^2 + 13375^2 .

It is an emirp because it is prime and its reverse (1656622441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1442266561 - 2⁷ = 1442266433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1442266561.

It is not a weakly prime, because it can be changed into another prime (1442266531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721133280 + 721133281.

It is an arithmetic number, because the mean of its divisors is an integer number (721133281).

Almost surely, 2^1442266561 is an apocalyptic number.

It is an amenable number.

1442266561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442266561 is an equidigital number, since it uses as much as digits as its factorization.

1442266561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 37.

The square root of 1442266561 is about 37977.1847429480. The cubic root of 1442266561 is about 1129.8354006211.

The spelling of 1442266561 in words is "one billion, four hundred forty-two million, two hundred sixty-six thousand, five hundred sixty-one".