490101 has 4 divisors (see below), whose sum is σ = 653472. Its totient is φ = 326732.

The previous prime is 490097. The next prime is 490103. The reversal of 490101 is 101094.

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 490101 - 2² = 490097 is a prime.

It is a D-number.

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

490101 is a modest number, since divided by 101 gives 49 as remainder.

490101 is a lucky number.

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 (490103) 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, 81681 + ... + 81686.

It is an arithmetic number, because the mean of its divisors is an integer number (163368).

2⁴⁹⁰¹⁰¹ is an apocalyptic number.

It is an amenable number.

490101 is a deficient number, since it is larger than the sum of its proper divisors (163371).

490101 is a wasteful number, since it uses less digits than its factorization.

490101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163370.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 490101 is about 700.0721391400. The cubic root of 490101 is about 78.8427679749.

Adding to 490101 its reverse (101094), we get a palindrome (591195).

The spelling of 490101 in words is "four hundred ninety thousand, one hundred one".