1128169 has 4 divisors (see below), whose sum is σ = 1289344. Its totient is φ = 966996.

The previous prime is 1128161. The next prime is 1128181. The reversal of 1128169 is 9618211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9618211 = 661 ⋅14551.

It is a cyclic number.

It is not a de Polignac number, because 1128169 - 2³ = 1128161 is a prime.

It is a super-2 number, since 2×1128169² = 2545530585122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128161) 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 3 ways as a sum of consecutive naturals, for example, 80577 + ... + 80590.

It is an arithmetic number, because the mean of its divisors is an integer number (322336).

2^1128169 is an apocalyptic number.

It is an amenable number.

1128169 is a deficient number, since it is larger than the sum of its proper divisors (161175).

1128169 is an equidigital number, since it uses as much as digits as its factorization.

1128169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161174.

The product of its digits is 864, while the sum is 28.

The square root of 1128169 is about 1062.1530021612. The cubic root of 1128169 is about 104.1017556839.

It can be divided in two parts, 112 and 8169, that added together give a square (8281 = 91²).

The spelling of 1128169 in words is "one million, one hundred twenty-eight thousand, one hundred sixty-nine".