490545 has 24 divisors (see below), whose sum is σ = 928512. Its totient is φ = 237600.

The previous prime is 490543. The next prime is 490549. The reversal of 490545 is 545094.

490545 is a nontrivial binomial coefficient, being equal to C(991, 2).

It is not a de Polignac number, because 490545 - 2¹ = 490543 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (490541) 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 23 ways as a sum of consecutive naturals, for example, 1 + ... + 990.

It is an arithmetic number, because the mean of its divisors is an integer number (38688).

2⁴⁹⁰⁵⁴⁵ is an apocalyptic number.

490545 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

490545 is the 990-th triangular number.

It is an amenable number.

490545 is a deficient number, since it is larger than the sum of its proper divisors (437967).

490545 is a wasteful number, since it uses less digits than its factorization.

490545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1010 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 490545 is about 700.3891775292. The cubic root of 490545 is about 78.8665696153.

It can be divided in two parts, 4905 and 45, that added together give a triangular number (4950 = T₉₉).

The spelling of 490545 in words is "four hundred ninety thousand, five hundred forty-five".