1128505 has 16 divisors (see below), whose sum is σ = 1630080. Its totient is φ = 732672.

The previous prime is 1128503. The next prime is 1128509. The reversal of 1128505 is 5058211.

It is a cyclic number.

It is not a de Polignac number, because 1128505 - 2¹ = 1128503 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1128503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184 + ... + 1513.

It is an arithmetic number, because the mean of its divisors is an integer number (101880).

2^1128505 is an apocalyptic number.

It is an amenable number.

1128505 is a deficient number, since it is larger than the sum of its proper divisors (501575).

1128505 is a wasteful number, since it uses less digits than its factorization.

1128505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1128505 is about 1062.3111596891. The cubic root of 1128505 is about 104.1120894542.

The spelling of 1128505 in words is "one million, one hundred twenty-eight thousand, five hundred five".