490285021 has 4 divisors (see below), whose sum is σ = 494867232. Its totient is φ = 485702812.

The previous prime is 490285013. The next prime is 490285031. The reversal of 490285021 is 120582094.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 490285021 - 2³ = 490285013 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490285031) 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, 2290945 + ... + 2291158.

It is an arithmetic number, because the mean of its divisors is an integer number (123716808).

Almost surely, 2^490285021 is an apocalyptic number.

It is an amenable number.

490285021 is a deficient number, since it is larger than the sum of its proper divisors (4582211).

490285021 is a wasteful number, since it uses less digits than its factorization.

490285021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4582210.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 490285021 is about 22142.3806533986. The cubic root of 490285021 is about 788.5263458711.

The spelling of 490285021 in words is "four hundred ninety million, two hundred eighty-five thousand, twenty-one".