1111865 has 8 divisors (see below), whose sum is σ = 1354560. Its totient is φ = 875952.

The previous prime is 1111853. The next prime is 1111867. The reversal of 1111865 is 5681111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1111865 - 2⁶ = 1111801 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111865.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111867) 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, 1325 + ... + 1994.

It is an arithmetic number, because the mean of its divisors is an integer number (169320).

2^1111865 is an apocalyptic number.

It is an amenable number.

1111865 is a deficient number, since it is larger than the sum of its proper divisors (242695).

1111865 is an equidigital number, since it uses as much as digits as its factorization.

1111865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391.

The product of its digits is 240, while the sum is 23.

The square root of 1111865 is about 1054.4500936507. The cubic root of 1111865 is about 103.5978366498.

Adding to 1111865 its reverse (5681111), we get a palindrome (6792976).

The spelling of 1111865 in words is "one million, one hundred eleven thousand, eight hundred sixty-five".