1311136 has 12 divisors (see below), whose sum is σ = 2581362. Its totient is φ = 655552.

The previous prime is 1311131. The next prime is 1311143. The reversal of 1311136 is 6311131.

It can be written as a sum of positive squares in only one way, i.e., 739600 + 571536 = 860^2 + 756^2 .

It is a super-2 number, since 2×1311136² = 3438155220992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1311131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20455 + ... + 20518.

2^1311136 is an apocalyptic number.

1311136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1311136 is a deficient number, since it is larger than the sum of its proper divisors (1270226).

1311136 is an equidigital number, since it uses as much as digits as its factorization.

1311136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40983 (or 40975 counting only the distinct ones).

The product of its digits is 54, while the sum is 16.

The square root of 1311136 is about 1145.0484705898. The cubic root of 1311136 is about 109.4500373248.

Adding to 1311136 its reverse (6311131), we get a palindrome (7622267).

The spelling of 1311136 in words is "one million, three hundred eleven thousand, one hundred thirty-six".