1128355 has 4 divisors (see below), whose sum is σ = 1354032. Its totient is φ = 902680.

The previous prime is 1128349. The next prime is 1128371. The reversal of 1128355 is 5538211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1128355 - 2⁷ = 1128227 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 112831 + ... + 112840.

It is an arithmetic number, because the mean of its divisors is an integer number (338508).

2^1128355 is an apocalyptic number.

1128355 is a deficient number, since it is larger than the sum of its proper divisors (225677).

1128355 is an equidigital number, since it uses as much as digits as its factorization.

1128355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225676.

The product of its digits is 1200, while the sum is 25.

The square root of 1128355 is about 1062.2405565596. The cubic root of 1128355 is about 104.1074764174.

The spelling of 1128355 in words is "one million, one hundred twenty-eight thousand, three hundred fifty-five".