8490505 has 4 divisors (see below), whose sum is σ = 10188612. Its totient is φ = 6792400.

The previous prime is 8490499. The next prime is 8490539. The reversal of 8490505 is 5050948.

8490505 is digitally balanced in base 3, 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 2595321 + 5895184 = 1611^2 + 2428^2 .

It is not a de Polignac number, because 8490505 - 2¹⁷ = 8359433 is a prime.

It is a Smith number, since the sum of its digits (31) 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849046 + ... + 849055.

It is an arithmetic number, because the mean of its divisors is an integer number (2547153).

Almost surely, 2^8490505 is an apocalyptic number.

It is an amenable number.

8490505 is a deficient number, since it is larger than the sum of its proper divisors (1698107).

8490505 is a wasteful number, since it uses less digits than its factorization.

8490505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698106.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 8490505 is about 2913.8471133538. The cubic root of 8490505 is about 204.0067359688.

The spelling of 8490505 in words is "eight million, four hundred ninety thousand, five hundred five".