8621005 has 4 divisors (see below), whose sum is σ = 10345212. Its totient is φ = 6896800.

The previous prime is 8620993. The next prime is 8621009. The reversal of 8621005 is 5001268.

It is a happy number.

8621005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1320201 + 7300804 = 1149^2 + 2702^2 .

It is not a de Polignac number, because 8621005 - 2⁵ = 8620973 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8621009) 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, 862096 + ... + 862105.

It is an arithmetic number, because the mean of its divisors is an integer number (2586303).

Almost surely, 2^8621005 is an apocalyptic number.

It is an amenable number.

8621005 is a deficient number, since it is larger than the sum of its proper divisors (1724207).

8621005 is a wasteful number, since it uses less digits than its factorization.

8621005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724206.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 8621005 is about 2936.1547983715. The cubic root of 8621005 is about 205.0466282988.

The spelling of 8621005 in words is "eight million, six hundred twenty-one thousand, five".