8521279 has 8 divisors (see below), whose sum is σ = 9208080. Its totient is φ = 7838976.

The previous prime is 8521259. The next prime is 8521283. The reversal of 8521279 is 9721258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8521279 - 2¹⁵ = 8488511 is a prime.

It is a super-2 number, since 2×8521279² = 145224391591682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8521229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3567 + ... + 5455.

It is an arithmetic number, because the mean of its divisors is an integer number (1151010).

Almost surely, 2^8521279 is an apocalyptic number.

8521279 is a deficient number, since it is larger than the sum of its proper divisors (686801).

8521279 is a wasteful number, since it uses less digits than its factorization.

8521279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249.

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

The square root of 8521279 is about 2919.1229847336. The cubic root of 8521279 is about 204.2529142387.

The spelling of 8521279 in words is "eight million, five hundred twenty-one thousand, two hundred seventy-nine".