128455645 has 16 divisors (see below), whose sum is σ = 161123760. Its totient is φ = 98187264.

The previous prime is 128455643. The next prime is 128455687. The reversal of 128455645 is 546554821.

It can be written as a sum of positive squares in 8 ways, for example, as 743044 + 127712601 = 862^2 + 11301^2 .

It is a cyclic number.

It is not a de Polignac number, because 128455645 - 2¹ = 128455643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128455598 and 128455607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128455643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9499 + ... + 18631.

It is an arithmetic number, because the mean of its divisors is an integer number (10070235).

Almost surely, 2^128455645 is an apocalyptic number.

It is an amenable number.

128455645 is a deficient number, since it is larger than the sum of its proper divisors (32668115).

128455645 is an equidigital number, since it uses as much as digits as its factorization.

128455645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9264.

The product of its digits is 192000, while the sum is 40.

The square root of 128455645 is about 11333.8274647182. The cubic root of 128455645 is about 504.5657083802.

The spelling of 128455645 in words is "one hundred twenty-eight million, four hundred fifty-five thousand, six hundred forty-five".