518961 has 4 divisors (see below), whose sum is σ = 691952. Its totient is φ = 345972.

The previous prime is 518953. The next prime is 518981. The reversal of 518961 is 169815.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 518961 - 2³ = 518953 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86491 + ... + 86496.

It is an arithmetic number, because the mean of its divisors is an integer number (172988).

2⁵¹⁸⁹⁶¹ is an apocalyptic number.

It is an amenable number.

518961 is a deficient number, since it is larger than the sum of its proper divisors (172991).

518961 is a wasteful number, since it uses less digits than its factorization.

518961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172990.

The product of its digits is 2160, while the sum is 30.

The square root of 518961 is about 720.3894779909. The cubic root of 518961 is about 80.3609213320.

The spelling of 518961 in words is "five hundred eighteen thousand, nine hundred sixty-one".