11984865 has 16 divisors (see below), whose sum is σ = 19219200. Its totient is φ = 6377472.

The previous prime is 11984857. The next prime is 11984887. The reversal of 11984865 is 56848911.

It is not a de Polignac number, because 11984865 - 2³ = 11984857 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11016 + ... + 12054.

It is an arithmetic number, because the mean of its divisors is an integer number (1201200).

Almost surely, 2^11984865 is an apocalyptic number.

11984865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11984865 is a deficient number, since it is larger than the sum of its proper divisors (7234335).

11984865 is a wasteful number, since it uses less digits than its factorization.

11984865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816.

The product of its digits is 69120, while the sum is 42.

The square root of 11984865 is about 3461.9163768063. The cubic root of 11984865 is about 228.8465566274.

The spelling of 11984865 in words is "eleven million, nine hundred eighty-four thousand, eight hundred sixty-five".