605842921 has 4 divisors (see below), whose sum is σ = 622217092. Its totient is φ = 589468752.

The previous prime is 605842903. The next prime is 605843003. The reversal of 605842921 is 129248506.

605842921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129248506 = 2 ⋅64624253.

It can be written as a sum of positive squares in 2 ways, for example, as 413715600 + 192127321 = 20340^2 + 13861^2 .

It is a cyclic number.

It is not a de Polignac number, because 605842921 - 2⁹ = 605842409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 16374133 = 605842921 / (6 + 0 + 5 + 8 + 4 + 2 + 9 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (605842901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8187030 + ... + 8187103.

It is an arithmetic number, because the mean of its divisors is an integer number (155554273).

Almost surely, 2^605842921 is an apocalyptic number.

It is an amenable number.

605842921 is a deficient number, since it is larger than the sum of its proper divisors (16374171).

605842921 is a wasteful number, since it uses less digits than its factorization.

605842921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16374170.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 605842921 is about 24613.8765943116. The cubic root of 605842921 is about 846.1616649917.

The spelling of 605842921 in words is "six hundred five million, eight hundred forty-two thousand, nine hundred twenty-one".