11986281 has 12 divisors (see below), whose sum is σ = 17392752. Its totient is φ = 7954296.

The previous prime is 11986237. The next prime is 11986313. The reversal of 11986281 is 18268911.

It is not a de Polignac number, because 11986281 - 2⁷ = 11986153 is a prime.

It is a super-2 number, since 2×11986281² = 287341864421922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11986211) 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, 891 + ... + 4976.

It is an arithmetic number, because the mean of its divisors is an integer number (1449396).

Almost surely, 2^11986281 is an apocalyptic number.

It is an amenable number.

11986281 is a deficient number, since it is larger than the sum of its proper divisors (5406471).

11986281 is a wasteful number, since it uses less digits than its factorization.

11986281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6100 (or 6097 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 11986281 is about 3462.1208817718. The cubic root of 11986281 is about 228.8555689376.

The spelling of 11986281 in words is "eleven million, nine hundred eighty-six thousand, two hundred eighty-one".