518042741 has 2 divisors, whose sum is σ = 518042742. Its totient is φ = 518042740.

The previous prime is 518042729. The next prime is 518042813. The reversal of 518042741 is 147240815.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366875716 + 151167025 = 19154^2 + 12295^2 .

It is a cyclic number.

It is not a de Polignac number, because 518042741 - 2¹⁴ = 518026357 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_27255083 and since 518042741 and 27255083 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 518042698 and 518042707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518042711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259021370 + 259021371.

It is an arithmetic number, because the mean of its divisors is an integer number (259021371).

Almost surely, 2^518042741 is an apocalyptic number.

It is an amenable number.

518042741 is a deficient number, since it is larger than the sum of its proper divisors (1).

518042741 is an equidigital number, since it uses as much as digits as its factorization.

518042741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 518042741 is about 22760.5522999773. The cubic root of 518042741 is about 803.1349599233.

It can be divided in two parts, 51804 and 2741, that added together give a palindrome (54545).

The spelling of 518042741 in words is "five hundred eighteen million, forty-two thousand, seven hundred forty-one".