605241821 has 4 divisors (see below), whose sum is σ = 616661532. Its totient is φ = 593822112.

The previous prime is 605241797. The next prime is 605241839. The reversal of 605241821 is 128142506.

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 480048100 + 125193721 = 21910^2 + 11189^2 .

It is a cyclic number.

It is not a de Polignac number, because 605241821 - 2¹⁸ = 604979677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605241121) 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, 5709776 + ... + 5709881.

It is an arithmetic number, because the mean of its divisors is an integer number (154165383).

Almost surely, 2^605241821 is an apocalyptic number.

It is an amenable number.

605241821 is a deficient number, since it is larger than the sum of its proper divisors (11419711).

605241821 is a wasteful number, since it uses less digits than its factorization.

605241821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11419710.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 605241821 is about 24601.6629722464. The cubic root of 605241821 is about 845.8817265967.

The spelling of 605241821 in words is "six hundred five million, two hundred forty-one thousand, eight hundred twenty-one".