605120261 has 4 divisors (see below), whose sum is σ = 605409024. Its totient is φ = 604831500.

The previous prime is 605120207. The next prime is 605120297. The reversal of 605120261 is 162021506.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 605120261 - 2¹⁰ = 605119237 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 (605120161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141215 + ... + 145436.

It is an arithmetic number, because the mean of its divisors is an integer number (151352256).

Almost surely, 2^605120261 is an apocalyptic number.

It is an amenable number.

605120261 is a deficient number, since it is larger than the sum of its proper divisors (288763).

605120261 is a wasteful number, since it uses less digits than its factorization.

605120261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288762.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 605120261 is about 24599.1922834877. The cubic root of 605120261 is about 845.8250923370.

Adding to 605120261 its reverse (162021506), we get a palindrome (767141767).

The spelling of 605120261 in words is "six hundred five million, one hundred twenty thousand, two hundred sixty-one".