1445224651 has 4 divisors (see below), whose sum is σ = 1556395792. Its totient is φ = 1334053512.

The previous prime is 1445224633. The next prime is 1445224661. The reversal of 1445224651 is 1564225441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1564225441 = 19973 ⋅78317.

It is a cyclic number.

It is not a de Polignac number, because 1445224651 - 2⁷ = 1445224523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445224601) 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 in 3 ways as a sum of consecutive naturals, for example, 55585551 + ... + 55585576.

It is an arithmetic number, because the mean of its divisors is an integer number (389098948).

Almost surely, 2^1445224651 is an apocalyptic number.

1445224651 is a deficient number, since it is larger than the sum of its proper divisors (111171141).

1445224651 is a wasteful number, since it uses less digits than its factorization.

1445224651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111171140.

The product of its digits is 38400, while the sum is 34.

The square root of 1445224651 is about 38016.1104138759. The cubic root of 1445224651 is about 1130.6073042737.

The spelling of 1445224651 in words is "one billion, four hundred forty-five million, two hundred twenty-four thousand, six hundred fifty-one".