518741 has 2 divisors, whose sum is σ = 518742. Its totient is φ = 518740.

The previous prime is 518737. The next prime is 518743. The reversal of 518741 is 147815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 14641 = 710^2 + 121^2 .

It is a cyclic number.

It is not a de Polignac number, because 518741 - 2² = 518737 is a prime.

Together with 518743, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 518741.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 518741.

It is not a weakly prime, because it can be changed into another prime (518743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259370 + 259371.

It is an arithmetic number, because the mean of its divisors is an integer number (259371).

2⁵¹⁸⁷⁴¹ is an apocalyptic number.

It is an amenable number.

518741 is a deficient number, since it is larger than the sum of its proper divisors (1).

518741 is an equidigital number, since it uses as much as digits as its factorization.

518741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 26.

The square root of 518741 is about 720.2367666261. The cubic root of 518741 is about 80.3495640871.

The spelling of 518741 in words is "five hundred eighteen thousand, seven hundred forty-one".