11845665 has 24 divisors (see below), whose sum is σ = 22113000. Its totient is φ = 5831424.

The previous prime is 11845663. The next prime is 11845693. The reversal of 11845665 is 56654811.

11845665 is a `hidden beast` number, since 11 + 84 + 566 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5184 + 11840481 = 72^2 + 3441^2 .

It is not a de Polignac number, because 11845665 - 2¹ = 11845663 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11845663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9540 + ... + 10709.

It is an arithmetic number, because the mean of its divisors is an integer number (921375).

Almost surely, 2^11845665 is an apocalyptic number.

11845665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11845665 is a deficient number, since it is larger than the sum of its proper divisors (10267335).

11845665 is a wasteful number, since it uses less digits than its factorization.

11845665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20273 (or 20270 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 11845665 is about 3441.7531869674. The cubic root of 11845665 is about 227.9571133555.

The spelling of 11845665 in words is "eleven million, eight hundred forty-five thousand, six hundred sixty-five".