128485745 has 8 divisors (see below), whose sum is σ = 163252584. Its totient is φ = 96742144.

The previous prime is 128485691. The next prime is 128485787. The reversal of 128485745 is 547584821.

It can be written as a sum of positive squares in 4 ways, for example, as 70543201 + 57942544 = 8399^2 + 7612^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 128485745 - 2⁶ = 128485681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128485696 and 128485705.

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 in 7 ways as a sum of consecutive naturals, for example, 755714 + ... + 755883.

It is an arithmetic number, because the mean of its divisors is an integer number (20406573).

Almost surely, 2^128485745 is an apocalyptic number.

It is an amenable number.

128485745 is a deficient number, since it is larger than the sum of its proper divisors (34766839).

128485745 is a wasteful number, since it uses less digits than its factorization.

128485745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511619.

The product of its digits is 358400, while the sum is 44.

The square root of 128485745 is about 11335.1552702202. The cubic root of 128485745 is about 504.6051156057.

The spelling of 128485745 in words is "one hundred twenty-eight million, four hundred eighty-five thousand, seven hundred forty-five".