8721854 has 4 divisors (see below), whose sum is σ = 13082784. Its totient is φ = 4360926.

The previous prime is 8721851. The next prime is 8721877. The reversal of 8721854 is 4581278.

8721854 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2180462 + ... + 2180465.

It is an arithmetic number, because the mean of its divisors is an integer number (3270696).

Almost surely, 2^8721854 is an apocalyptic number.

8721854 is a deficient number, since it is larger than the sum of its proper divisors (4360930).

8721854 is a wasteful number, since it uses less digits than its factorization.

8721854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360929.

The product of its digits is 17920, while the sum is 35.

The square root of 8721854 is about 2953.2785171738. The cubic root of 8721854 is about 205.8430796669.

The spelling of 8721854 in words is "eight million, seven hundred twenty-one thousand, eight hundred fifty-four".