490551 has 4 divisors (see below), whose sum is σ = 654072. Its totient is φ = 327032.

The previous prime is 490549. The next prime is 490559. The reversal of 490551 is 155094.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 490551 - 2¹ = 490549 is a prime.

It is a D-number.

490551 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 490551.

It is not an unprimeable number, because it can be changed into a prime (490559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81756 + ... + 81761.

It is an arithmetic number, because the mean of its divisors is an integer number (163518).

2⁴⁹⁰⁵⁵¹ is an apocalyptic number.

490551 is a deficient number, since it is larger than the sum of its proper divisors (163521).

490551 is a wasteful number, since it uses less digits than its factorization.

490551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163520.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 490551 is about 700.3934608490. The cubic root of 490551 is about 78.8668911607.

The spelling of 490551 in words is "four hundred ninety thousand, five hundred fifty-one".