490505 has 4 divisors (see below), whose sum is σ = 588612. Its totient is φ = 392400.

The previous prime is 490499. The next prime is 490519. The reversal of 490505 is 505094.

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 94864 + 395641 = 308^2 + 629^2 .

It is not a de Polignac number, because 490505 - 2⁸ = 490249 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 14.

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, 49046 + ... + 49055.

It is an arithmetic number, because the mean of its divisors is an integer number (147153).

2⁴⁹⁰⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

490505 is a deficient number, since it is larger than the sum of its proper divisors (98107).

490505 is an equidigital number, since it uses as much as digits as its factorization.

490505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98106.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 490505 is about 700.3606213944. The cubic root of 490505 is about 78.8644259121.

Adding to 490505 its reverse (505094), we get a palindrome (995599).

It can be divided in two parts, 4 and 90505, that added together give a palindrome (90509).

The spelling of 490505 in words is "four hundred ninety thousand, five hundred five".