1000128 has 28 divisors (see below), whose sum is σ = 2646680. Its totient is φ = 333312.

The previous prime is 1000121. The next prime is 1000133. The reversal of 1000128 is 8210001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1000121) 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, 2413 + ... + 2796.

2^1000128 is an apocalyptic number.

It is an amenable number.

1000128 is an abundant number, since it is smaller than the sum of its proper divisors (1646552).

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

1000128 is an equidigital number, since it uses as much as digits as its factorization.

1000128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5224 (or 5214 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1000128 is about 1000.0639979521. The cubic root of 1000128 is about 100.0042664846.

Adding to 1000128 its reverse (8210001), we get a palindrome (9210129).

It can be divided in two parts, 1000 and 128, that added together give a triangular number (1128 = T₄₇).

The spelling of 1000128 in words is "one million, one hundred twenty-eight", and thus it is an aban number.