1128765 has 16 divisors (see below), whose sum is σ = 1970496. Its totient is φ = 547200.

The previous prime is 1128763. The next prime is 1128769. The reversal of 1128765 is 5678211.

It is not a de Polignac number, because 1128765 - 2¹ = 1128763 is a prime.

It is a super-2 number, since 2×1128765² = 2548220850450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128761) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3256 + ... + 3585.

It is an arithmetic number, because the mean of its divisors is an integer number (123156).

2^1128765 is an apocalyptic number.

1128765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128765 is a deficient number, since it is larger than the sum of its proper divisors (841731).

1128765 is a wasteful number, since it uses less digits than its factorization.

1128765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6860.

The product of its digits is 3360, while the sum is 30.

The square root of 1128765 is about 1062.4335273324. The cubic root of 1128765 is about 104.1200844165.

The spelling of 1128765 in words is "one million, one hundred twenty-eight thousand, seven hundred sixty-five".