11867865 has 8 divisors (see below), whose sum is σ = 18988608. Its totient is φ = 6329520.

The previous prime is 11867831. The next prime is 11867893. The reversal of 11867865 is 56876811.

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

It is not a de Polignac number, because 11867865 - 2⁹ = 11867353 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395581 + ... + 395610.

It is an arithmetic number, because the mean of its divisors is an integer number (2373576).

Almost surely, 2^11867865 is an apocalyptic number.

11867865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11867865 is a deficient number, since it is larger than the sum of its proper divisors (7120743).

11867865 is an equidigital number, since it uses as much as digits as its factorization.

11867865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791199.

The product of its digits is 80640, while the sum is 42.

The square root of 11867865 is about 3444.9767778608. The cubic root of 11867865 is about 228.0994295478.

The spelling of 11867865 in words is "eleven million, eight hundred sixty-seven thousand, eight hundred sixty-five".