605291 has 4 divisors (see below), whose sum is σ = 631632. Its totient is φ = 578952.

The previous prime is 605261. The next prime is 605309. The reversal of 605291 is 192506.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 26317 = 605291 / (6 + 0 + 5 + 2 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (605221) 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, 13136 + ... + 13181.

It is an arithmetic number, because the mean of its divisors is an integer number (157908).

2⁶⁰⁵²⁹¹ is an apocalyptic number.

605291 is a deficient number, since it is larger than the sum of its proper divisors (26341).

605291 is a wasteful number, since it uses less digits than its factorization.

605291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26340.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 605291 is about 778.0044987016. The cubic root of 605291 is about 84.5904636718.

Adding to 605291 its reverse (192506), we get a palindrome (797797).

The spelling of 605291 in words is "six hundred five thousand, two hundred ninety-one".