1128865 has 8 divisors (see below), whose sum is σ = 1398528. Its totient is φ = 873840.

The previous prime is 1128823. The next prime is 1128889. The reversal of 1128865 is 5688211.

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

It is not a de Polignac number, because 1128865 - 2⁷ = 1128737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3487 + ... + 3796.

It is an arithmetic number, because the mean of its divisors is an integer number (174816).

2^1128865 is an apocalyptic number.

It is an amenable number.

1128865 is a deficient number, since it is larger than the sum of its proper divisors (269663).

1128865 is an equidigital number, since it uses as much as digits as its factorization.

1128865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7319.

The product of its digits is 3840, while the sum is 31.

The square root of 1128865 is about 1062.4805880580. The cubic root of 1128865 is about 104.1231590750.

The spelling of 1128865 in words is "one million, one hundred twenty-eight thousand, eight hundred sixty-five".