250128 has 50 divisors (see below), whose sum is σ = 727694. Its totient is φ = 82944.

The previous prime is 250123. The next prime is 250147. The reversal of 250128 is 821052.

It can be written as a sum of positive squares in only one way, i.e., 186624 + 63504 = 432^2 + 252^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 6 and base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 250128.

It is not an unprimeable number, because it can be changed into a prime (250123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1200 + ... + 1392.

2²⁵⁰¹²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 250128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363847).

250128 is an abundant number, since it is smaller than the sum of its proper divisors (477566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

250128 is a wasteful number, since it uses less digits than its factorization.

250128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 250128 is about 500.1279836202. The cubic root of 250128 is about 63.0068019867.

It can be divided in two parts, 250 and 128, that added together give a triangular number (378 = T₂₇).

The spelling of 250128 in words is "two hundred fifty thousand, one hundred twenty-eight".