1445355857 has 8 divisors (see below), whose sum is σ = 1645306560. Its totient is φ = 1256830960.

The previous prime is 1445355839. The next prime is 1445355869. The reversal of 1445355857 is 7585535441.

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

It is not a de Polignac number, because 1445355857 - 2¹⁶ = 1445290321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445355887) 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 7 ways as a sum of consecutive naturals, for example, 2856182 + ... + 2856687.

It is an arithmetic number, because the mean of its divisors is an integer number (205663320).

Almost surely, 2^1445355857 is an apocalyptic number.

It is an amenable number.

1445355857 is a deficient number, since it is larger than the sum of its proper divisors (199950703).

1445355857 is a wasteful number, since it uses less digits than its factorization.

1445355857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5712903.

The product of its digits is 1680000, while the sum is 47.

The square root of 1445355857 is about 38017.8360378389. The cubic root of 1445355857 is about 1130.6415176336.

The spelling of 1445355857 in words is "one billion, four hundred forty-five million, three hundred fifty-five thousand, eight hundred fifty-seven".