8365921 has 4 divisors (see below), whose sum is σ = 8858052. Its totient is φ = 7873792.

The previous prime is 8365913. The next prime is 8365933. The reversal of 8365921 is 1295638.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6838225 + 1527696 = 2615^2 + 1236^2 .

It is a cyclic number.

It is not a de Polignac number, because 8365921 - 2³ = 8365913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8365901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246040 + ... + 246073.

It is an arithmetic number, because the mean of its divisors is an integer number (2214513).

Almost surely, 2^8365921 is an apocalyptic number.

It is an amenable number.

8365921 is a deficient number, since it is larger than the sum of its proper divisors (492131).

8365921 is a wasteful number, since it uses less digits than its factorization.

8365921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492130.

The product of its digits is 12960, while the sum is 34.

The square root of 8365921 is about 2892.3901880625. The cubic root of 8365921 is about 203.0039958122.

The spelling of 8365921 in words is "eight million, three hundred sixty-five thousand, nine hundred twenty-one".