8925821 has 4 divisors (see below), whose sum is σ = 8954652. Its totient is φ = 8896992.

The previous prime is 8925809. The next prime is 8925827. The reversal of 8925821 is 1285298.

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 3189796 + 5736025 = 1786^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 8925821 - 2¹⁴ = 8909437 is a prime.

It is a super-3 number, since 3×8925821³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8925827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13946 + ... + 14571.

It is an arithmetic number, because the mean of its divisors is an integer number (2238663).

Almost surely, 2^8925821 is an apocalyptic number.

It is an amenable number.

8925821 is a deficient number, since it is larger than the sum of its proper divisors (28831).

8925821 is a wasteful number, since it uses less digits than its factorization.

8925821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28830.

The product of its digits is 11520, while the sum is 35.

The square root of 8925821 is about 2987.6112531586. The cubic root of 8925821 is about 207.4353289535.

The spelling of 8925821 in words is "eight million, nine hundred twenty-five thousand, eight hundred twenty-one".