8521972 has 6 divisors (see below), whose sum is σ = 14913458. Its totient is φ = 4260984.

The previous prime is 8521963. The next prime is 8521999. The reversal of 8521972 is 2791258.

It can be written as a sum of positive squares in only one way, i.e., 5410276 + 3111696 = 2326^2 + 1764^2 .

It is a d-powerful number, because it can be written as 8² + 5⁶ + 2⁴ + 1 + 9 + 7⁶ + 2²³ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065243 + ... + 1065250.

Almost surely, 2^8521972 is an apocalyptic number.

It is an amenable number.

8521972 is a deficient number, since it is larger than the sum of its proper divisors (6391486).

8521972 is a wasteful number, since it uses less digits than its factorization.

8521972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130497 (or 2130495 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 8521972 is about 2919.2416823552. The cubic root of 8521972 is about 204.2584511005.

The spelling of 8521972 in words is "eight million, five hundred twenty-one thousand, nine hundred seventy-two".