11866257 has 40 divisors (see below), whose sum is σ = 19514880. Its totient is φ = 7140960.

The previous prime is 11866247. The next prime is 11866259. The reversal of 11866257 is 75266811.

11866257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11866257 - 2¹⁰ = 11865233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11866259) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 62032 + ... + 62222.

It is an arithmetic number, because the mean of its divisors is an integer number (487872).

Almost surely, 2^11866257 is an apocalyptic number.

It is an amenable number.

11866257 is a deficient number, since it is larger than the sum of its proper divisors (7648623).

11866257 is a wasteful number, since it uses less digits than its factorization.

11866257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 266 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 11866257 is about 3444.7433866690. The cubic root of 11866257 is about 228.0891272047.

The spelling of 11866257 in words is "eleven million, eight hundred sixty-six thousand, two hundred fifty-seven".