1123165 has 4 divisors (see below), whose sum is σ = 1347804. Its totient is φ = 898528.

The previous prime is 1123151. The next prime is 1123181. The reversal of 1123165 is 5613211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5613211 = 29 ⋅193559.

It can be written as a sum of positive squares in 2 ways, for example, as 811801 + 311364 = 901^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123165 - 2¹³ = 1114973 is a prime.

It is a super-2 number, since 2×1123165² = 2522999234450, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112312 + ... + 112321.

It is an arithmetic number, because the mean of its divisors is an integer number (336951).

2^1123165 is an apocalyptic number.

It is an amenable number.

1123165 is a deficient number, since it is larger than the sum of its proper divisors (224639).

1123165 is an equidigital number, since it uses as much as digits as its factorization.

1123165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224638.

The product of its digits is 180, while the sum is 19.

The square root of 1123165 is about 1059.7947914573. The cubic root of 1123165 is about 103.9476129157.

Adding to 1123165 its reverse (5613211), we get a palindrome (6736376).

The spelling of 1123165 in words is "one million, one hundred twenty-three thousand, one hundred sixty-five".