11513665 has 8 divisors (see below), whose sum is σ = 13887720. Its totient is φ = 9163392.

The previous prime is 11513659. The next prime is 11513687. The reversal of 11513665 is 56631511.

It can be written as a sum of positive squares in 4 ways, for example, as 8042896 + 3470769 = 2836^2 + 1863^2 .

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 11513665 - 2³ = 11513657 is a prime.

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, 4860 + ... + 6829.

It is an arithmetic number, because the mean of its divisors is an integer number (1735965).

Almost surely, 2^11513665 is an apocalyptic number.

It is an amenable number.

11513665 is a deficient number, since it is larger than the sum of its proper divisors (2374055).

11513665 is a wasteful number, since it uses less digits than its factorization.

11513665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11891.

The product of its digits is 2700, while the sum is 28.

The square root of 11513665 is about 3393.1791877235. The cubic root of 11513665 is about 225.8072402902.

The spelling of 11513665 in words is "eleven million, five hundred thirteen thousand, six hundred sixty-five".