11724865 has 4 divisors (see below), whose sum is σ = 14069844. Its totient is φ = 9379888.

The previous prime is 11724863. The next prime is 11724887. The reversal of 11724865 is 56842711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56842711 = 1181 ⋅48131.

It can be written as a sum of positive squares in 2 ways, for example, as 4112784 + 7612081 = 2028^2 + 2759^2 .

It is a cyclic number.

It is not a de Polignac number, because 11724865 - 2¹ = 11724863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11724865.

It is not an unprimeable number, because it can be changed into a prime (11724863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172482 + ... + 1172491.

It is an arithmetic number, because the mean of its divisors is an integer number (3517461).

Almost surely, 2^11724865 is an apocalyptic number.

It is an amenable number.

11724865 is a deficient number, since it is larger than the sum of its proper divisors (2344979).

11724865 is an equidigital number, since it uses as much as digits as its factorization.

11724865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344978.

The product of its digits is 13440, while the sum is 34.

The square root of 11724865 is about 3424.1590208400. The cubic root of 11724865 is about 227.1795754738.

The spelling of 11724865 in words is "eleven million, seven hundred twenty-four thousand, eight hundred sixty-five".