11061681 has 4 divisors (see below), whose sum is σ = 14748912. Its totient is φ = 7374452.

The previous prime is 11061671. The next prime is 11061691. The reversal of 11061681 is 18616011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (11061671) and next prime (11061691).

It is a cyclic number.

It is not a de Polignac number, because 11061681 - 2¹⁹ = 10537393 is a prime.

It is a super-2 number, since 2×11061681² = 244721573091522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11061641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1843611 + ... + 1843616.

It is an arithmetic number, because the mean of its divisors is an integer number (3687228).

Almost surely, 2^11061681 is an apocalyptic number.

It is an amenable number.

11061681 is a deficient number, since it is larger than the sum of its proper divisors (3687231).

11061681 is an equidigital number, since it uses as much as digits as its factorization.

11061681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687230.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 11061681 is about 3325.9105520143. The cubic root of 11061681 is about 222.8129233318.

Adding to 11061681 its reverse (18616011), we get a palindrome (29677692).

The spelling of 11061681 in words is "eleven million, sixty-one thousand, six hundred eighty-one".