8479521 has 6 divisors (see below), whose sum is σ = 12248210. Its totient is φ = 5653008.

The previous prime is 8479511. The next prime is 8479531. The reversal of 8479521 is 1259748.

8479521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8479511) and next prime (8479531).

It can be written as a sum of positive squares in only one way, i.e., 5239521 + 3240000 = 2289^2 + 1800^2 .

It is not a de Polignac number, because 8479521 - 2⁵ = 8479489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8479511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 471076 + ... + 471093.

Almost surely, 2^8479521 is an apocalyptic number.

It is an amenable number.

8479521 is a deficient number, since it is larger than the sum of its proper divisors (3768689).

8479521 is a wasteful number, since it uses less digits than its factorization.

8479521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942175 (or 942172 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 8479521 is about 2911.9617099131. The cubic root of 8479521 is about 203.9187248324.

The spelling of 8479521 in words is "eight million, four hundred seventy-nine thousand, five hundred twenty-one".