8721246 has 16 divisors (see below), whose sum is σ = 17515008. Its totient is φ = 2895000.

The previous prime is 8721239. The next prime is 8721253. The reversal of 8721246 is 6421278.

It is an interprime number because it is at equal distance from previous prime (8721239) and next prime (8721253).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1390 + ... + 4401.

It is an arithmetic number, because the mean of its divisors is an integer number (1094688).

Almost surely, 2^8721246 is an apocalyptic number.

8721246 is an abundant number, since it is smaller than the sum of its proper divisors (8793762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8721246 is a wasteful number, since it uses less digits than its factorization.

8721246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6047.

The product of its digits is 5376, while the sum is 30.

The square root of 8721246 is about 2953.1755789319. The cubic root of 8721246 is about 205.8382964522.

Subtracting from 8721246 its reverse (6421278), we obtain a cube (2299968 = 132³).

The spelling of 8721246 in words is "eight million, seven hundred twenty-one thousand, two hundred forty-six".