8683521 has 16 divisors (see below), whose sum is σ = 14435328. Its totient is φ = 4510800.

The previous prime is 8683517. The next prime is 8683523. The reversal of 8683521 is 1253868.

It is a happy number.

It is not a de Polignac number, because 8683521 - 2² = 8683517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

8683521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8683523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18565 + ... + 19026.

It is an arithmetic number, because the mean of its divisors is an integer number (902208).

It is a Proth number, since it is equal to 265 ⋅ 2¹⁵ + 1 and 265 < 2¹⁵.

Almost surely, 2^8683521 is an apocalyptic number.

It is an amenable number.

8683521 is a deficient number, since it is larger than the sum of its proper divisors (5751807).

8683521 is a wasteful number, since it uses less digits than its factorization.

8683521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37612.

The product of its digits is 11520, while the sum is 33.

The square root of 8683521 is about 2946.7814645813. The cubic root of 8683521 is about 205.5410731241.

The spelling of 8683521 in words is "eight million, six hundred eighty-three thousand, five hundred twenty-one".