11409865 has 4 divisors (see below), whose sum is σ = 13691844. Its totient is φ = 9127888.

The previous prime is 11409851. The next prime is 11409877. The reversal of 11409865 is 56890411.

11409865 = 2388² + 2389².

11409865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56890411 = 41 ⋅1387571.

It can be written as a sum of positive squares in 2 ways, for example, as 5702544 + 5707321 = 2388^2 + 2389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11409865 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 11409865.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1140982 + ... + 1140991.

It is an arithmetic number, because the mean of its divisors is an integer number (3422961).

Almost surely, 2^11409865 is an apocalyptic number.

11409865 is the 2389-th centered square number.

It is an amenable number.

11409865 is a deficient number, since it is larger than the sum of its proper divisors (2281979).

11409865 is an equidigital number, since it uses as much as digits as its factorization.

11409865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281978.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 11409865 is about 3377.8491677397. The cubic root of 11409865 is about 225.1266118673.

The spelling of 11409865 in words is "eleven million, four hundred nine thousand, eight hundred sixty-five".