11182081 has 4 divisors (see below), whose sum is σ = 11567700. Its totient is φ = 10796464.

The previous prime is 11182079. The next prime is 11182097. The reversal of 11182081 is 18028111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8673025 + 2509056 = 2945^2 + 1584^2 .

It is a cyclic number.

It is not a de Polignac number, because 11182081 - 2¹ = 11182079 is a prime.

It is a super-2 number, since 2×11182081² = 250077870981122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11182001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192766 + ... + 192823.

It is an arithmetic number, because the mean of its divisors is an integer number (2891925).

It is a Proth number, since it is equal to 1365 ⋅ 2¹³ + 1 and 1365 < 2¹³.

Almost surely, 2^11182081 is an apocalyptic number.

It is an amenable number.

11182081 is a deficient number, since it is larger than the sum of its proper divisors (385619).

11182081 is an equidigital number, since it uses as much as digits as its factorization.

11182081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385618.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 11182081 is about 3343.9618717922. The cubic root of 11182081 is about 223.6184045642.

The spelling of 11182081 in words is "eleven million, one hundred eighty-two thousand, eighty-one".