11605865 has 8 divisors (see below), whose sum is σ = 14660160. Its totient is φ = 8795952.

The previous prime is 11605859. The next prime is 11605871. The reversal of 11605865 is 56850611.

It is a happy number.

11605865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11605859) and next prime (11605871).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11605865 - 2⁶ = 11605801 is a prime.

It is a super-2 number, since 2×11605865² = 269392204796450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60989 + ... + 61178.

It is an arithmetic number, because the mean of its divisors is an integer number (1832520).

Almost surely, 2^11605865 is an apocalyptic number.

It is an amenable number.

11605865 is a deficient number, since it is larger than the sum of its proper divisors (3054295).

11605865 is a wasteful number, since it uses less digits than its factorization.

11605865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122191.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 11605865 is about 3406.7381760270. The cubic root of 11605865 is about 226.4083839558.

The spelling of 11605865 in words is "eleven million, six hundred five thousand, eight hundred sixty-five".