12366261 has 6 divisors (see below), whose sum is σ = 17862390. Its totient is φ = 8244168.

The previous prime is 12366247. The next prime is 12366271. The reversal of 12366261 is 16266321.

12366261 is a `hidden beast` number, since 1 + 2 + 36 + 626 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11902500 + 463761 = 3450^2 + 681^2 .

It is not a de Polignac number, because 12366261 - 2⁶ = 12366197 is a prime.

It is a super-2 number, since 2×12366261² = 305848822240242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12366271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 687006 + ... + 687023.

It is an arithmetic number, because the mean of its divisors is an integer number (2977065).

Almost surely, 2^12366261 is an apocalyptic number.

It is an amenable number.

12366261 is a deficient number, since it is larger than the sum of its proper divisors (5496129).

12366261 is a wasteful number, since it uses less digits than its factorization.

12366261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374035 (or 1374032 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 12366261 is about 3516.5694931282. The cubic root of 12366261 is about 231.2487902542.

The spelling of 12366261 in words is "twelve million, three hundred sixty-six thousand, two hundred sixty-one".