605006021 has 2 divisors, whose sum is σ = 605006022. Its totient is φ = 605006020.

The previous prime is 605005987. The next prime is 605006023. The reversal of 605006021 is 120600506.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583753921 + 21252100 = 24161^2 + 4610^2 .

It is a cyclic number.

It is not a de Polignac number, because 605006021 - 2⁶ = 605005957 is a prime.

Together with 605006023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 605005984 and 605006002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605006023) 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, 302503010 + 302503011.

It is an arithmetic number, because the mean of its divisors is an integer number (302503011).

Almost surely, 2^605006021 is an apocalyptic number.

It is an amenable number.

605006021 is a deficient number, since it is larger than the sum of its proper divisors (1).

605006021 is an equidigital number, since it uses as much as digits as its factorization.

605006021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 605006021 is about 24596.8701464231. The cubic root of 605006021 is about 845.7718615187.

Adding to 605006021 its reverse (120600506), we get a palindrome (725606527).

The spelling of 605006021 in words is "six hundred five million, six thousand, twenty-one".