8421854 has 16 divisors (see below), whose sum is σ = 14510976. Its totient is φ = 3591000.

The previous prime is 8421839. The next prime is 8421857. The reversal of 8421854 is 4581248.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8421854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1529 + ... + 4379.

It is an arithmetic number, because the mean of its divisors is an integer number (906936).

Almost surely, 2^8421854 is an apocalyptic number.

8421854 is a deficient number, since it is larger than the sum of its proper divisors (6089122).

8421854 is a wasteful number, since it uses less digits than its factorization.

8421854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071.

The product of its digits is 10240, while the sum is 32.

The square root of 8421854 is about 2902.0430734226. The cubic root of 8421854 is about 203.4554070039.

Subtracting from 8421854 its reverse (4581248), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 8421854 in words is "eight million, four hundred twenty-one thousand, eight hundred fifty-four".