490102121 has 4 divisors (see below), whose sum is σ = 498136644. Its totient is φ = 482067600.

The previous prime is 490102097. The next prime is 490102141. The reversal of 490102121 is 121201094.

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 101223721 + 388878400 = 10061^2 + 19720^2 .

It is a cyclic number.

It is not a de Polignac number, because 490102121 - 2²² = 485907817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 490102093 and 490102102.

It is not an unprimeable number, because it can be changed into a prime (490102141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4017170 + ... + 4017291.

It is an arithmetic number, because the mean of its divisors is an integer number (124534161).

Almost surely, 2^490102121 is an apocalyptic number.

It is an amenable number.

490102121 is a deficient number, since it is larger than the sum of its proper divisors (8034523).

490102121 is an equidigital number, since it uses as much as digits as its factorization.

490102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8034522.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 490102121 is about 22138.2501792712. The cubic root of 490102121 is about 788.4282808680.

The spelling of 490102121 in words is "four hundred ninety million, one hundred two thousand, one hundred twenty-one".