128241700 has 18 divisors (see below), whose sum is σ = 278284706. Its totient is φ = 51296640.

The previous prime is 128241689. The next prime is 128241731. The reversal of 128241700 is 7142821.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 9388096 + 118853604 = 3064^2 + 10902^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 641109 + ... + 641308.

Almost surely, 2^128241700 is an apocalyptic number.

128241700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128241700 is an abundant number, since it is smaller than the sum of its proper divisors (150043006).

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

128241700 is a wasteful number, since it uses less digits than its factorization.

128241700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282431 (or 1282424 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 128241700 is about 11324.3851930248. The cubic root of 128241700 is about 504.2854318784.

The spelling of 128241700 in words is "one hundred twenty-eight million, two hundred forty-one thousand, seven hundred".