11681051 has 4 divisors (see below), whose sum is σ = 11929632. Its totient is φ = 11432472.

The previous prime is 11681039. The next prime is 11681053. The reversal of 11681051 is 15018611.

It is a happy number.

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 11681051 - 2¹⁰ = 11680027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11681053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124220 + ... + 124313.

It is an arithmetic number, because the mean of its divisors is an integer number (2982408).

Almost surely, 2^11681051 is an apocalyptic number.

11681051 is a deficient number, since it is larger than the sum of its proper divisors (248581).

11681051 is an equidigital number, since it uses as much as digits as its factorization.

11681051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248580.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 11681051 is about 3417.7552574753. The cubic root of 11681051 is about 226.8962439917.

Adding to 11681051 its reverse (15018611), we get a palindrome (26699662).

The spelling of 11681051 in words is "eleven million, six hundred eighty-one thousand, fifty-one".