490621 has 4 divisors (see below), whose sum is σ = 499932. Its totient is φ = 481312.

The previous prime is 490619. The next prime is 490627. The reversal of 490621 is 126094.

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 171396 + 319225 = 414^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 490621 - 2¹ = 490619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 490592 and 490601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490627) 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, 4576 + ... + 4681.

It is an arithmetic number, because the mean of its divisors is an integer number (124983).

2⁴⁹⁰⁶²¹ is an apocalyptic number.

It is an amenable number.

490621 is a deficient number, since it is larger than the sum of its proper divisors (9311).

490621 is an equidigital number, since it uses as much as digits as its factorization.

490621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9310.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 490621 is about 700.4434309778. The cubic root of 490621 is about 78.8706423301.

It can be divided in two parts, 490 and 621, that added together give a palindrome (1111).

The spelling of 490621 in words is "four hundred ninety thousand, six hundred twenty-one".