529985 has 4 divisors (see below), whose sum is σ = 635988. Its totient is φ = 423984.

The previous prime is 529981. The next prime is 529987. The reversal of 529985 is 589925.

It is a happy number.

It is a Cunningham number, because it is equal to 728²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 190096 + 339889 = 436^2 + 583^2 .

It is a cyclic number.

It is not a de Polignac number, because 529985 - 2² = 529981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (529981) 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, 52994 + ... + 53003.

It is an arithmetic number, because the mean of its divisors is an integer number (158997).

2⁵²⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

529985 is a deficient number, since it is larger than the sum of its proper divisors (106003).

529985 is a wasteful number, since it uses less digits than its factorization.

529985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106002.

The product of its digits is 32400, while the sum is 38.

The square root of 529985 is about 728.0006868129. Note that the first 3 decimals coincide. The cubic root of 529985 is about 80.9259598788.

The spelling of 529985 in words is "five hundred twenty-nine thousand, nine hundred eighty-five".