490509 has 16 divisors (see below), whose sum is σ = 747840. Its totient is φ = 317520.

The previous prime is 490499. The next prime is 490519. The reversal of 490509 is 905094.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (490499) and next prime (490519).

It is not a de Polignac number, because 490509 - 2⁴ = 490493 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754 + ... + 1244.

It is an arithmetic number, because the mean of its divisors is an integer number (46740).

2⁴⁹⁰⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

490509 is a deficient number, since it is larger than the sum of its proper divisors (257331).

490509 is a wasteful number, since it uses less digits than its factorization.

490509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 490509 is about 700.3634770603. The cubic root of 490509 is about 78.8646402877.

It can be divided in two parts, 490 and 509, that added together give a palindrome (999).

The spelling of 490509 in words is "four hundred ninety thousand, five hundred nine".