128485441 has 4 divisors (see below), whose sum is σ = 146840512. Its totient is φ = 110130372.

The previous prime is 128485417. The next prime is 128485453. The reversal of 128485441 is 144584821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128485441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128485441.

It is not an unprimeable number, because it can be changed into a prime (128488441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9177525 + ... + 9177538.

It is an arithmetic number, because the mean of its divisors is an integer number (36710128).

Almost surely, 2^128485441 is an apocalyptic number.

It is an amenable number.

128485441 is a deficient number, since it is larger than the sum of its proper divisors (18355071).

128485441 is an equidigital number, since it uses as much as digits as its factorization.

128485441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18355070.

The product of its digits is 40960, while the sum is 37.

The square root of 128485441 is about 11335.1418606032. The cubic root of 128485441 is about 504.6047176366.

The spelling of 128485441 in words is "one hundred twenty-eight million, four hundred eighty-five thousand, four hundred forty-one".