1147128 has 16 divisors (see below), whose sum is σ = 2867880. Its totient is φ = 382368.

The previous prime is 1147127. The next prime is 1147141. The reversal of 1147128 is 8217411.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 47797 = 1147128 / (1 + 1 + 4 + 7 + 1 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 1147098 and 1147107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147127) 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, 23875 + ... + 23922.

2^1147128 is an apocalyptic number.

It is an amenable number.

1147128 is an abundant number, since it is smaller than the sum of its proper divisors (1720752).

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

1147128 is a wasteful number, since it uses less digits than its factorization.

1147128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47806 (or 47802 counting only the distinct ones).

The product of its digits is 448, while the sum is 24.

The square root of 1147128 is about 1071.0406154764. The cubic root of 1147128 is about 104.6816662525.

It can be divided in two parts, 1147 and 128, that added together give a triangular number (1275 = T₅₀).

The spelling of 1147128 in words is "one million, one hundred forty-seven thousand, one hundred twenty-eight".