1128155 has 8 divisors (see below), whose sum is σ = 1547232. Its totient is φ = 773568.

The previous prime is 1128151. The next prime is 1128161. The reversal of 1128155 is 5518211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1128155 - 2² = 1128151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1128155.

It is not an unprimeable number, because it can be changed into a prime (1128151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16082 + ... + 16151.

It is an arithmetic number, because the mean of its divisors is an integer number (193404).

2^1128155 is an apocalyptic number.

1128155 is a deficient number, since it is larger than the sum of its proper divisors (419077).

1128155 is an equidigital number, since it uses as much as digits as its factorization.

1128155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32245.

The product of its digits is 400, while the sum is 23.

The square root of 1128155 is about 1062.1464117531. The cubic root of 1128155 is about 104.1013250656.

The spelling of 1128155 in words is "one million, one hundred twenty-eight thousand, one hundred fifty-five".