8500921 has 8 divisors (see below), whose sum is σ = 9987264. Its totient is φ = 7133520.

The previous prime is 8500907. The next prime is 8500931. The reversal of 8500921 is 1290058.

8500921 is digitally balanced in base 2, 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 8500921 - 2¹¹ = 8498873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8500931) 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, 29581 + ... + 29866.

It is an arithmetic number, because the mean of its divisors is an integer number (1248408).

Almost surely, 2^8500921 is an apocalyptic number.

It is an amenable number.

8500921 is a deficient number, since it is larger than the sum of its proper divisors (1486343).

8500921 is a wasteful number, since it uses less digits than its factorization.

8500921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59471.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 8500921 is about 2915.6338933412. The cubic root of 8500921 is about 204.0901258186.

Adding to 8500921 its reverse (1290058), we get a palindrome (9790979).

The spelling of 8500921 in words is "eight million, five hundred thousand, nine hundred twenty-one".