1331105 has 4 divisors (see below), whose sum is σ = 1597332. Its totient is φ = 1064880.

The previous prime is 1331093. The next prime is 1331107. The reversal of 1331105 is 5011331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 966289 + 364816 = 983^2 + 604^2 .

It is not a de Polignac number, because 1331105 - 2⁶ = 1331041 is a prime.

It is a Duffinian number.

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 1331105.

It is not an unprimeable number, because it can be changed into a prime (1331107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133106 + ... + 133115.

It is an arithmetic number, because the mean of its divisors is an integer number (399333).

2^1331105 is an apocalyptic number.

It is an amenable number.

1331105 is a deficient number, since it is larger than the sum of its proper divisors (266227).

1331105 is an equidigital number, since it uses as much as digits as its factorization.

1331105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266226.

The product of its (nonzero) digits is 45, while the sum is 14.

The square root of 1331105 is about 1153.7352382588. The cubic root of 1331105 is about 110.0028924859.

Adding to 1331105 its reverse (5011331), we get a palindrome (6342436).

The spelling of 1331105 in words is "one million, three hundred thirty-one thousand, one hundred five".