8721895 has 32 divisors (see below), whose sum is σ = 13345920. Its totient is φ = 5322240.

The previous prime is 8721883. The next prime is 8721907. The reversal of 8721895 is 5981278.

8721895 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8721883) and next prime (8721907).

It is not a de Polignac number, because 8721895 - 2¹¹ = 8719847 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12865 + ... + 13525.

It is an arithmetic number, because the mean of its divisors is an integer number (417060).

Almost surely, 2^8721895 is an apocalyptic number.

8721895 is a deficient number, since it is larger than the sum of its proper divisors (4624025).

8721895 is a wasteful number, since it uses less digits than its factorization.

8721895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715.

The product of its digits is 40320, while the sum is 40.

The square root of 8721895 is about 2953.2854586037. The cubic root of 8721895 is about 205.8434022112.

The spelling of 8721895 in words is "eight million, seven hundred twenty-one thousand, eight hundred ninety-five".