1128863 has 4 divisors (see below), whose sum is σ = 1177968. Its totient is φ = 1079760.

The previous prime is 1128823. The next prime is 1128889. The reversal of 1128863 is 3688211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3688211 = 23 ⋅160357.

It is a cyclic number.

It is not a de Polignac number, because 1128863 - 2²⁰ = 80287 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24518 + ... + 24563.

It is an arithmetic number, because the mean of its divisors is an integer number (294492).

2^1128863 is an apocalyptic number.

1128863 is a deficient number, since it is larger than the sum of its proper divisors (49105).

1128863 is an equidigital number, since it uses as much as digits as its factorization.

1128863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49104.

The product of its digits is 2304, while the sum is 29.

The square root of 1128863 is about 1062.4796468639. The cubic root of 1128863 is about 104.1230975836.

It can be divided in two parts, 1128 and 863, that added together give a palindrome (1991).

The spelling of 1128863 in words is "one million, one hundred twenty-eight thousand, eight hundred sixty-three".