1121165 has 4 divisors (see below), whose sum is σ = 1345404. Its totient is φ = 896928.

The previous prime is 1121147. The next prime is 1121173. The reversal of 1121165 is 5611211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5611211 = 109 ⋅51479.

It can be written as a sum of positive squares in 2 ways, for example, as 203401 + 917764 = 451^2 + 958^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121165 - 2⁶ = 1121101 is a prime.

It is an Ulam number.

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 3 ways as a sum of consecutive naturals, for example, 112112 + ... + 112121.

It is an arithmetic number, because the mean of its divisors is an integer number (336351).

2^1121165 is an apocalyptic number.

It is an amenable number.

1121165 is a deficient number, since it is larger than the sum of its proper divisors (224239).

1121165 is an equidigital number, since it uses as much as digits as its factorization.

1121165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224238.

The product of its digits is 60, while the sum is 17.

The square root of 1121165 is about 1058.8507921327. The cubic root of 1121165 is about 103.8858770335.

Adding to 1121165 its reverse (5611211), we get a palindrome (6732376).

The spelling of 1121165 in words is "one million, one hundred twenty-one thousand, one hundred sixty-five".