5991865 has 8 divisors (see below), whose sum is σ = 7843968. Its totient is φ = 4357680.

The previous prime is 5991857. The next prime is 5991883. The reversal of 5991865 is 5681995.

It is a happy number.

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

It is not a de Polignac number, because 5991865 - 2³ = 5991857 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, 54417 + ... + 54526.

It is an arithmetic number, because the mean of its divisors is an integer number (980496).

Almost surely, 2^5991865 is an apocalyptic number.

5991865 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5991865 is a deficient number, since it is larger than the sum of its proper divisors (1852103).

5991865 is a wasteful number, since it uses less digits than its factorization.

5991865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108959.

The product of its digits is 97200, while the sum is 43.

The square root of 5991865 is about 2447.8286296226. The cubic root of 5991865 is about 181.6298983842.

The spelling of 5991865 in words is "five million, nine hundred ninety-one thousand, eight hundred sixty-five".