1445622491 has 2 divisors, whose sum is σ = 1445622492. Its totient is φ = 1445622490.

The previous prime is 1445622481. The next prime is 1445622499. The reversal of 1445622491 is 1942265441.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1445622491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1445622499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722811245 + 722811246.

It is an arithmetic number, because the mean of its divisors is an integer number (722811246).

Almost surely, 2^1445622491 is an apocalyptic number.

1445622491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445622491 is an equidigital number, since it uses as much as digits as its factorization.

1445622491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 1445622491 is about 38021.3425722975. The cubic root of 1445622491 is about 1130.7110389059.

The spelling of 1445622491 in words is "one billion, four hundred forty-five million, six hundred twenty-two thousand, four hundred ninety-one".