1131365 has 8 divisors (see below), whose sum is σ = 1363608. Its totient is φ = 901120.

The previous prime is 1131353. The next prime is 1131379. The reversal of 1131365 is 5631311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 268324 + 863041 = 518^2 + 929^2 .

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

It is not a de Polignac number, because 1131365 - 2¹⁶ = 1065829 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 1445 + ... + 2085.

It is an arithmetic number, because the mean of its divisors is an integer number (170451).

2^1131365 is an apocalyptic number.

It is an amenable number.

1131365 is a deficient number, since it is larger than the sum of its proper divisors (232243).

1131365 is an equidigital number, since it uses as much as digits as its factorization.

1131365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its digits is 270, while the sum is 20.

The square root of 1131365 is about 1063.6564294922. The cubic root of 1131365 is about 104.1999665980.

Adding to 1131365 its reverse (5631311), we get a palindrome (6762676).

The spelling of 1131365 in words is "one million, one hundred thirty-one thousand, three hundred sixty-five".