605013021 has 6 divisors (see below), whose sum is σ = 873907710. Its totient is φ = 403342008.

The previous prime is 605013001. The next prime is 605013023. The reversal of 605013021 is 120310506.

It can be written as a sum of positive squares in only one way, i.e., 591219225 + 13793796 = 24315^2 + 3714^2 .

It is not a de Polignac number, because 605013021 - 2²² = 600818717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 605012985 and 605013003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605013023) 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 5 ways as a sum of consecutive naturals, for example, 33611826 + ... + 33611843.

It is an arithmetic number, because the mean of its divisors is an integer number (145651285).

Almost surely, 2^605013021 is an apocalyptic number.

It is an amenable number.

605013021 is a deficient number, since it is larger than the sum of its proper divisors (268894689).

605013021 is a wasteful number, since it uses less digits than its factorization.

605013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67223675 (or 67223672 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 605013021 is about 24597.0124405384. The cubic root of 605013021 is about 845.7751234037.

Adding to 605013021 its reverse (120310506), we get a palindrome (725323527).

The spelling of 605013021 in words is "six hundred five million, thirteen thousand, twenty-one".