8321572 has 18 divisors (see below), whose sum is σ = 16940742. Its totient is φ = 3566304.

The previous prime is 8321557. The next prime is 8321591. The reversal of 8321572 is 2751238.

It can be written as a sum of positive squares in only one way, i.e., 8156736 + 164836 = 2856^2 + 406^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 8321572.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21033 + ... + 21424.

Almost surely, 2^8321572 is an apocalyptic number.

It is an amenable number.

8321572 is an abundant number, since it is smaller than the sum of its proper divisors (8619170).

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

8321572 is a wasteful number, since it uses less digits than its factorization.

8321572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42475 (or 42466 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 8321572 is about 2884.7135039723. The cubic root of 8321572 is about 202.6446418721.

The spelling of 8321572 in words is "eight million, three hundred twenty-one thousand, five hundred seventy-two".