8417521 has 8 divisors (see below), whose sum is σ = 9659520. Its totient is φ = 7185408.

The previous prime is 8417503. The next prime is 8417527. The reversal of 8417521 is 1257148.

8417521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8417521 - 2⁵ = 8417489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8417521.

It is not an unprimeable number, because it can be changed into a prime (8417527) 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, 541 + ... + 4138.

It is an arithmetic number, because the mean of its divisors is an integer number (1207440).

Almost surely, 2^8417521 is an apocalyptic number.

It is an amenable number.

8417521 is a deficient number, since it is larger than the sum of its proper divisors (1241999).

8417521 is a wasteful number, since it uses less digits than its factorization.

8417521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943.

The product of its digits is 2240, while the sum is 28.

The square root of 8417521 is about 2901.2964343548. The cubic root of 8417521 is about 203.4205087693.

It can be divided in two parts, 841752 and 1, that added together give a triangular number (841753 = T₁₂₉₇).

The spelling of 8417521 in words is "eight million, four hundred seventeen thousand, five hundred twenty-one".