1131313 has 6 divisors (see below), whose sum is σ = 1161302.
Its totient is φ = 1102080.
The previous prime is 1131307. The next prime is 1131323. The reversal of 1131313 is 3131311.
Adding to 1131313 its reverse (3131311), we get a palindrome (4262624).
It can be divided in two parts, 1131 and 313, that added together give a square (1444 = 382).
It is a happy number.
It can be written as a sum of positive squares in 3 ways, for example, as 74529 + 1056784 = 273^2 + 1028^2
It is a de Polignac number, because none of the positive numbers 2k-1131313 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1131293 and 1131302.
It is not an unprimeable number, because it can be changed into a prime (1131323) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1345 + ... + 2017.
21131313 is an apocalyptic number.
1131313 is the 673-rd heptagonal number.
It is an amenable number.
1131313 is a deficient number, since it is larger than the sum of its proper divisors (29989).
1131313 is an frugal number, since it uses more digits than its factorization.
1131313 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 755 (or 714 counting only the distinct ones).
The product of its digits is 27, while the sum is 13.
The square root of 1131313 is about 1063.6319852280.
The cubic root of 1131313 is about 104.1983701544.
The spelling of 1131313 in words is "one million, one hundred thirty-one thousand, three hundred thirteen".