517481 has 2 divisors, whose sum is σ = 517482. Its totient is φ = 517480.

The previous prime is 517471. The next prime is 517487. The reversal of 517481 is 184715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 477481 + 40000 = 691^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 517481 - 2⁶ = 517417 is a prime.

It is a super-2 number, since 2×517481² = 535573170722, which contains 22 as substring.

It is a Chen prime.

It is equal to p₄₂₈₆₆ and since 517481 and 42866 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 517481.

It is not a weakly prime, because it can be changed into another prime (517487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258740 + 258741.

It is an arithmetic number, because the mean of its divisors is an integer number (258741).

2⁵¹⁷⁴⁸¹ is an apocalyptic number.

It is an amenable number.

517481 is a deficient number, since it is larger than the sum of its proper divisors (1).

517481 is an equidigital number, since it uses as much as digits as its factorization.

517481 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 517481 is about 719.3615224628. The cubic root of 517481 is about 80.2844561102.

The spelling of 517481 in words is "five hundred seventeen thousand, four hundred eighty-one".