605423421 has 6 divisors (see below), whose sum is σ = 874500510. Its totient is φ = 403615608.

The previous prime is 605423419. The next prime is 605423449. The reversal of 605423421 is 124324506.

605423421 is a `hidden beast` number, since 605 + 4 + 2 + 34 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 508006521 + 97416900 = 22539^2 + 9870^2 .

It is not a de Polignac number, because 605423421 - 2¹ = 605423419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605423491) 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, 33634626 + ... + 33634643.

It is an arithmetic number, because the mean of its divisors is an integer number (145750085).

Almost surely, 2^605423421 is an apocalyptic number.

It is an amenable number.

605423421 is a deficient number, since it is larger than the sum of its proper divisors (269077089).

605423421 is a wasteful number, since it uses less digits than its factorization.

605423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67269275 (or 67269272 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 605423421 is about 24605.3535028457. The cubic root of 605423421 is about 845.9663190991.

Adding to 605423421 its reverse (124324506), we get a palindrome (729747927).

The spelling of 605423421 in words is "six hundred five million, four hundred twenty-three thousand, four hundred twenty-one".