1128111 has 8 divisors (see below), whose sum is σ = 1509120. Its totient is φ = 749592.

The previous prime is 1128109. The next prime is 1128143. The reversal of 1128111 is 1118211.

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

It is not a de Polignac number, because 1128111 - 2¹ = 1128109 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 (1128151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1210 + ... + 1928.

It is an arithmetic number, because the mean of its divisors is an integer number (188640).

2^1128111 is an apocalyptic number.

1128111 is a deficient number, since it is larger than the sum of its proper divisors (381009).

1128111 is an equidigital number, since it uses as much as digits as its factorization.

1128111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245.

The product of its digits is 16, while the sum is 15.

The square root of 1128111 is about 1062.1256987758. The cubic root of 1128111 is about 104.0999716706.

The spelling of 1128111 in words is "one million, one hundred twenty-eight thousand, one hundred eleven".