1311266 has 16 divisors (see below), whose sum is σ = 2259360. Its totient is φ = 564480.

The previous prime is 1311263. The next prime is 1311287. The reversal of 1311266 is 6621131.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1311263) 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 in 7 ways as a sum of consecutive naturals, for example, 1151 + ... + 1986.

It is an arithmetic number, because the mean of its divisors is an integer number (141210).

2^1311266 is an apocalyptic number.

1311266 is a deficient number, since it is larger than the sum of its proper divisors (948094).

1311266 is a wasteful number, since it uses less digits than its factorization.

1311266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3169.

The product of its digits is 216, while the sum is 20.

The square root of 1311266 is about 1145.1052353387. The cubic root of 1311266 is about 109.4536545531.

Adding to 1311266 its reverse (6621131), we get a palindrome (7932397).

The spelling of 1311266 in words is "one million, three hundred eleven thousand, two hundred sixty-six".