804616021 has 16 divisors (see below), whose sum is σ = 901067328. Its totient is φ = 712124800.

The previous prime is 804616013. The next prime is 804616039. The reversal of 804616021 is 120616408.

It is a cyclic number.

It is not a de Polignac number, because 804616021 - 2³ = 804616013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804616081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249606 + ... + 252808.

It is an arithmetic number, because the mean of its divisors is an integer number (56316708).

Almost surely, 2^804616021 is an apocalyptic number.

It is an amenable number.

804616021 is a deficient number, since it is larger than the sum of its proper divisors (96451307).

804616021 is a wasteful number, since it uses less digits than its factorization.

804616021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 804616021 is about 28365.7543703671. The cubic root of 804616021 is about 930.0998162414.

The spelling of 804616021 in words is "eight hundred four million, six hundred sixteen thousand, twenty-one".