8279521 has 4 divisors (see below), whose sum is σ = 8472112. Its totient is φ = 8086932.

The previous prime is 8279489. The next prime is 8279533. The reversal of 8279521 is 1259728.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8279521 - 2⁵ = 8279489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8271521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96231 + ... + 96316.

It is an arithmetic number, because the mean of its divisors is an integer number (2118028).

Almost surely, 2^8279521 is an apocalyptic number.

It is an amenable number.

8279521 is a deficient number, since it is larger than the sum of its proper divisors (192591).

8279521 is a wasteful number, since it uses less digits than its factorization.

8279521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192590.

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

The square root of 8279521 is about 2877.4156807802. The cubic root of 8279521 is about 202.3027271522.

The spelling of 8279521 in words is "eight million, two hundred seventy-nine thousand, five hundred twenty-one".