1311131 has 2 divisors, whose sum is σ = 1311132. Its totient is φ = 1311130.

The previous prime is 1311127. The next prime is 1311143.

It is a happy number.

1311131 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1311131 - 2² = 1311127 is a prime.

It is a super-2 number, since 2×1311131² = 3438128998322, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1311181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655565 + 655566.

It is an arithmetic number, because the mean of its divisors is an integer number (655566).

2^1311131 is an apocalyptic number.

1311131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311131 is an equidigital number, since it uses as much as digits as its factorization.

1311131 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 1311131 is about 1145.0462872740. The cubic root of 1311131 is about 109.4498981958.

Multiplying 1311131 by its sum of digits (11), we get a palindrome (14422441).

The spelling of 1311131 in words is "one million, three hundred eleven thousand, one hundred thirty-one".