11261311 has 4 divisors (see below), whose sum is σ = 11328912. Its totient is φ = 11193712.

The previous prime is 11261303. The next prime is 11261317. The reversal of 11261311 is 11316211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11261311 - 2³ = 11261303 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11261317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33550 + ... + 33883.

It is an arithmetic number, because the mean of its divisors is an integer number (2832228).

Almost surely, 2^11261311 is an apocalyptic number.

11261311 is a deficient number, since it is larger than the sum of its proper divisors (67601).

11261311 is an equidigital number, since it uses as much as digits as its factorization.

11261311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67600.

The product of its digits is 36, while the sum is 16.

The square root of 11261311 is about 3355.7876869671. The cubic root of 11261311 is about 224.1453072398.

Adding to 11261311 its reverse (11316211), we get a palindrome (22577522).

The spelling of 11261311 in words is "eleven million, two hundred sixty-one thousand, three hundred eleven".