518460421 has 2 divisors, whose sum is σ = 518460422. Its totient is φ = 518460420.

The previous prime is 518460377. The next prime is 518460443. The reversal of 518460421 is 124064815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290873025 + 227587396 = 17055^2 + 15086^2 .

It is a cyclic number.

It is not a de Polignac number, because 518460421 - 2¹¹ = 518458373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518460221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259230210 + 259230211.

It is an arithmetic number, because the mean of its divisors is an integer number (259230211).

Almost surely, 2^518460421 is an apocalyptic number.

It is an amenable number.

518460421 is a deficient number, since it is larger than the sum of its proper divisors (1).

518460421 is an equidigital number, since it uses as much as digits as its factorization.

518460421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 518460421 is about 22769.7259755141. The cubic root of 518460421 is about 803.3507486148.

The spelling of 518460421 in words is "five hundred eighteen million, four hundred sixty thousand, four hundred twenty-one".