128250833 has 4 divisors (see below), whose sum is σ = 128304228. Its totient is φ = 128197440.

The previous prime is 128250821. The next prime is 128250877. The reversal of 128250833 is 338052821.

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 24373969 + 103876864 = 4937^2 + 10192^2 .

It is a cyclic number.

It is not a de Polignac number, because 128250833 - 2¹⁶ = 128185297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128250833.

It is not an unprimeable number, because it can be changed into a prime (128250803) 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, 22916 + ... + 27957.

It is an arithmetic number, because the mean of its divisors is an integer number (32076057).

Almost surely, 2^128250833 is an apocalyptic number.

It is an amenable number.

128250833 is a deficient number, since it is larger than the sum of its proper divisors (53395).

128250833 is an equidigital number, since it uses as much as digits as its factorization.

128250833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53394.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 128250833 is about 11324.7884306949. The cubic root of 128250833 is about 504.2974028403.

The spelling of 128250833 in words is "one hundred twenty-eight million, two hundred fifty thousand, eight hundred thirty-three".