11806281 has 12 divisors (see below), whose sum is σ = 17084340. Its totient is φ = 7856640.

The previous prime is 11806261. The next prime is 11806297. The reversal of 11806281 is 18260811.

It can be written as a sum of positive squares in 2 ways, for example, as 2295225 + 9511056 = 1515^2 + 3084^2 .

It is not a de Polignac number, because 11806281 - 2²² = 7611977 is a prime.

It is a super-2 number, since 2×11806281² = 278776542101922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11806231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7185 + ... + 8673.

It is an arithmetic number, because the mean of its divisors is an integer number (1423695).

Almost surely, 2^11806281 is an apocalyptic number.

It is an amenable number.

11806281 is a deficient number, since it is larger than the sum of its proper divisors (5278059).

11806281 is a wasteful number, since it uses less digits than its factorization.

11806281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376 (or 2373 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 11806281 is about 3436.0269207327. The cubic root of 11806281 is about 227.7041985798.

The spelling of 11806281 in words is "eleven million, eight hundred six thousand, two hundred eighty-one".