1445224661 has 2 divisors, whose sum is σ = 1445224662. Its totient is φ = 1445224660.

The previous prime is 1445224633. The next prime is 1445224663. The reversal of 1445224661 is 1664225441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1367890225 + 77334436 = 36985^2 + 8794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445224661 - 2⁶ = 1445224597 is a prime.

Together with 1445224663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1445224663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722612330 + 722612331.

It is an arithmetic number, because the mean of its divisors is an integer number (722612331).

Almost surely, 2^1445224661 is an apocalyptic number.

It is an amenable number.

1445224661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445224661 is an equidigital number, since it uses as much as digits as its factorization.

1445224661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 35.

The square root of 1445224661 is about 38016.1105453990. The cubic root of 1445224661 is about 1130.6073068814.

The spelling of 1445224661 in words is "one billion, four hundred forty-five million, two hundred twenty-four thousand, six hundred sixty-one".