1131131 has 2 divisors, whose sum is σ = 1131132.
Its totient is φ = 1131130.
The previous prime is 1131121. The next prime is 1131133. The reversal of 1131131 is 1311311.
It is a happy number.
It is a strong prime.
It is an emirp because it is prime and its reverse (1311311) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1131131 is a prime.
It is a super-2 number, since 2×11311312 = 2558914678322, which contains 22 as substring.
Together with 1131133, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (1131133) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565565 + 565566.
It is an arithmetic number, because the mean of its divisors is an integer number (565566).
21131131 is an apocalyptic number.
1131131 is a deficient number, since it is larger than the sum of its proper divisors (1).
1131131 is an equidigital number, since it uses as much as digits as its factorization.
1131131 is an evil number, because the sum of its binary digits is even.
The product of its digits is 9, while the sum is 11.
The square root of 1131131 is about 1063.5464258790.
The cubic root of 1131131 is about 104.1927822165.
Adding to 1131131 its reverse (1311311), we get a palindrome (2442442).
The spelling of 1131131 in words is "one million, one hundred thirty-one thousand, one hundred thirty-one".