128051285 has 4 divisors (see below), whose sum is σ = 153661548. Its totient is φ = 102441024.

The previous prime is 128051267. The next prime is 128051353. The reversal of 128051285 is 582150821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64673764 + 63377521 = 8042^2 + 7961^2 .

It is a cyclic number.

It is not a de Polignac number, because 128051285 - 2⁶ = 128051221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12805124 + ... + 12805133.

It is an arithmetic number, because the mean of its divisors is an integer number (38415387).

Almost surely, 2^128051285 is an apocalyptic number.

It is an amenable number.

128051285 is a deficient number, since it is larger than the sum of its proper divisors (25610263).

128051285 is an equidigital number, since it uses as much as digits as its factorization.

128051285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25610262.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 128051285 is about 11315.9747702087. The cubic root of 128051285 is about 504.0357183156.

The spelling of 128051285 in words is "one hundred twenty-eight million, fifty-one thousand, two hundred eighty-five".