490852561 has 2 divisors, whose sum is σ = 490852562. Its totient is φ = 490852560.

The previous prime is 490852553. The next prime is 490852567. The reversal of 490852561 is 165258094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450288400 + 40564161 = 21220^2 + 6369^2 .

It is a cyclic number.

It is not a de Polignac number, because 490852561 - 2³ = 490852553 is a prime.

It is not a weakly prime, because it can be changed into another prime (490852567) 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 as a sum of consecutive naturals, namely, 245426280 + 245426281.

It is an arithmetic number, because the mean of its divisors is an integer number (245426281).

Almost surely, 2^490852561 is an apocalyptic number.

It is an amenable number.

490852561 is a deficient number, since it is larger than the sum of its proper divisors (1).

490852561 is an equidigital number, since it uses as much as digits as its factorization.

490852561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 490852561 is about 22155.1926419068. The cubic root of 490852561 is about 788.8304871054.

The spelling of 490852561 in words is "four hundred ninety million, eight hundred fifty-two thousand, five hundred sixty-one".