1113665 has 16 divisors (see below), whose sum is σ = 1562112. Its totient is φ = 746304.

The previous prime is 1113643. The next prime is 1113667. The reversal of 1113665 is 5663111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1113665 - 2¹⁶ = 1048129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1113665.

It is not an unprimeable number, because it can be changed into a prime (1113667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1307 + ... + 1983.

It is an arithmetic number, because the mean of its divisors is an integer number (97632).

2^1113665 is an apocalyptic number.

It is an amenable number.

1113665 is a deficient number, since it is larger than the sum of its proper divisors (448447).

1113665 is an equidigital number, since it uses as much as digits as its factorization.

1113665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its digits is 540, while the sum is 23.

The square root of 1113665 is about 1055.3032739455. The cubic root of 1113665 is about 103.6537114090.

Adding to 1113665 its reverse (5663111), we get a palindrome (6776776).

The spelling of 1113665 in words is "one million, one hundred thirteen thousand, six hundred sixty-five".