8212724 has 18 divisors (see below), whose sum is σ = 15564150. Its totient is φ = 3790176.

The previous prime is 8212723. The next prime is 8212759. The reversal of 8212724 is 4272128.

It can be written as a sum of positive squares in 3 ways, for example, as 868624 + 7344100 = 932^2 + 2710^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 8212693 and 8212702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8212723) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 5399 + ... + 6750.

It is an arithmetic number, because the mean of its divisors is an integer number (864675).

Almost surely, 2^8212724 is an apocalyptic number.

It is an amenable number.

8212724 is a deficient number, since it is larger than the sum of its proper divisors (7351426).

8212724 is a wasteful number, since it uses less digits than its factorization.

8212724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12179 (or 12164 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 8212724 is about 2865.7850582345. The cubic root of 8212724 is about 201.7572157479.

The spelling of 8212724 in words is "eight million, two hundred twelve thousand, seven hundred twenty-four".