8870521 has 8 divisors (see below), whose sum is σ = 9705888. Its totient is φ = 8040000.

The previous prime is 8870509. The next prime is 8870551. The reversal of 8870521 is 1250788.

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 8870521 - 2⁵ = 8870489 is a prime.

It is a super-2 number, since 2×8870521² = 157372285622882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8870551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3406 + ... + 5416.

It is an arithmetic number, because the mean of its divisors is an integer number (1213236).

Almost surely, 2^8870521 is an apocalyptic number.

It is an amenable number.

8870521 is a deficient number, since it is larger than the sum of its proper divisors (835367).

8870521 is a wasteful number, since it uses less digits than its factorization.

8870521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 8870521 is about 2978.3419884224. The cubic root of 8870521 is about 207.0060520841.

The spelling of 8870521 in words is "eight million, eight hundred seventy thousand, five hundred twenty-one".