7216865 has 8 divisors (see below), whose sum is σ = 9116160. Its totient is φ = 5469552.

The previous prime is 7216837. The next prime is 7216879. The reversal of 7216865 is 5686127.

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 7216865 - 2⁶ = 7216801 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, 37889 + ... + 38078.

It is an arithmetic number, because the mean of its divisors is an integer number (1139520).

Almost surely, 2^7216865 is an apocalyptic number.

It is an amenable number.

7216865 is a deficient number, since it is larger than the sum of its proper divisors (1899295).

7216865 is a wasteful number, since it uses less digits than its factorization.

7216865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75991.

The product of its digits is 20160, while the sum is 35.

The square root of 7216865 is about 2686.4223420751. The cubic root of 7216865 is about 193.2485276753.

The spelling of 7216865 in words is "seven million, two hundred sixteen thousand, eight hundred sixty-five".