513866 has 8 divisors (see below), whose sum is σ = 804384. Its totient is φ = 245740.

The previous prime is 513841. The next prime is 513871. The reversal of 513866 is 668315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 513866.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5540 + ... + 5631.

It is an arithmetic number, because the mean of its divisors is an integer number (100548).

2⁵¹³⁸⁶⁶ is an apocalyptic number.

513866 is a deficient number, since it is larger than the sum of its proper divisors (290518).

513866 is a wasteful number, since it uses less digits than its factorization.

513866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11196.

The product of its digits is 4320, while the sum is 29.

The square root of 513866 is about 716.8444740667. The cubic root of 513866 is about 80.0970696708.

Subtracting 513866 from its reverse (668315), we obtain a square (154449 = 393²).

The spelling of 513866 in words is "five hundred thirteen thousand, eight hundred sixty-six".