804621 has 4 divisors (see below), whose sum is σ = 1072832. Its totient is φ = 536412.

The previous prime is 804619. The next prime is 804653. The reversal of 804621 is 126408.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 804621 - 2¹ = 804619 is a prime.

It is a D-number.

It is a Duffinian number.

804621 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 804621.

It is not an unprimeable number, because it can be changed into a prime (804611) 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, 134101 + ... + 134106.

It is an arithmetic number, because the mean of its divisors is an integer number (268208).

2⁸⁰⁴⁶²¹ is an apocalyptic number.

It is an amenable number.

804621 is a deficient number, since it is larger than the sum of its proper divisors (268211).

804621 is a wasteful number, since it uses less digits than its factorization.

804621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268210.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 804621 is about 897.0066889383. The cubic root of 804621 is about 93.0101734737.

The spelling of 804621 in words is "eight hundred four thousand, six hundred twenty-one".