1204128 has 72 divisors (see below), whose sum is σ = 3547908. Its totient is φ = 387072.

The previous prime is 1204117. The next prime is 1204139. The reversal of 1204128 is 8214021.

It is an interprime number because it is at equal distance from previous prime (1204117) and next prime (1204139).

It can be written as a sum of positive squares in 2 ways, for example, as 1192464 + 11664 = 1092^2 + 108^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1204128.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10600 + ... + 10712.

2^1204128 is an apocalyptic number.

1204128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1204128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1773954).

1204128 is an abundant number, since it is smaller than the sum of its proper divisors (2343780).

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

1204128 is a wasteful number, since it uses less digits than its factorization.

1204128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1204128 is about 1097.3276630068. The cubic root of 1204128 is about 106.3875689775.

Adding to 1204128 its reverse (8214021), we get a palindrome (9418149).

The spelling of 1204128 in words is "one million, two hundred four thousand, one hundred twenty-eight".