1445317273 has 8 divisors (see below), whose sum is σ = 1487037888. Its totient is φ = 1403736624.

The previous prime is 1445317253. The next prime is 1445317297. The reversal of 1445317273 is 3727135441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1445317273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445317253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13861 + ... + 55522.

It is an arithmetic number, because the mean of its divisors is an integer number (185879736).

Almost surely, 2^1445317273 is an apocalyptic number.

It is an amenable number.

1445317273 is a deficient number, since it is larger than the sum of its proper divisors (41720615).

1445317273 is an equidigital number, since it uses as much as digits as its factorization.

1445317273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69983.

The product of its digits is 70560, while the sum is 37.

The square root of 1445317273 is about 38017.3285884214. The cubic root of 1445317273 is about 1130.6314566602.

The spelling of 1445317273 in words is "one billion, four hundred forty-five million, three hundred seventeen thousand, two hundred seventy-three".