11687505 has 16 divisors (see below), whose sum is σ = 18757440. Its totient is φ = 6214208.

The previous prime is 11687491. The next prime is 11687521. The reversal of 11687505 is 50578611.

It is a cyclic number.

It is not a de Polignac number, because 11687505 - 2⁶ = 11687441 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4834 + ... + 6836.

It is an arithmetic number, because the mean of its divisors is an integer number (1172340).

Almost surely, 2^11687505 is an apocalyptic number.

11687505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11687505 is a deficient number, since it is larger than the sum of its proper divisors (7069935).

11687505 is a wasteful number, since it uses less digits than its factorization.

11687505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 11687505 is about 3418.6993140667. The cubic root of 11687505 is about 226.9380244428.

The spelling of 11687505 in words is "eleven million, six hundred eighty-seven thousand, five hundred five".