128042250 has 128 divisors (see below), whose sum is σ = 378293760. Its totient is φ = 28257600.

The previous prime is 128042227. The next prime is 128042267. The reversal of 128042250 is 52240821.

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 128042250.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4415236 + ... + 4415264.

It is an arithmetic number, because the mean of its divisors is an integer number (2955420).

Almost surely, 2^128042250 is an apocalyptic number.

128042250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128042250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189146880).

128042250 is an abundant number, since it is smaller than the sum of its proper divisors (250251510).

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

128042250 is an frugal number, since it uses more digits than its factorization.

128042250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 128042250 is about 11315.5755487735. The cubic root of 128042250 is about 504.0238635085.

The spelling of 128042250 in words is "one hundred twenty-eight million, forty-two thousand, two hundred fifty".