1445216506 has 4 divisors (see below), whose sum is σ = 2167824762. Its totient is φ = 722608252.

The previous prime is 1445216491. The next prime is 1445216527. The reversal of 1445216506 is 6056125441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1098325881 + 346890625 = 33141^2 + 18625^2 .

It is an unprimeable number.

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, 361304125 + ... + 361304128.

Almost surely, 2^1445216506 is an apocalyptic number.

1445216506 is a deficient number, since it is larger than the sum of its proper divisors (722608256).

1445216506 is an equidigital number, since it uses as much as digits as its factorization.

1445216506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722608255.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1445216506 is about 38016.0032880891. The cubic root of 1445216506 is about 1130.6051803101.

The spelling of 1445216506 in words is "one billion, four hundred forty-five million, two hundred sixteen thousand, five hundred six".