529921 has 4 divisors (see below), whose sum is σ = 605632. Its totient is φ = 454212.

The previous prime is 529871. The next prime is 529927. The reversal of 529921 is 129925.

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 a cyclic number.

It is not a de Polignac number, because 529921 - 2¹⁵ = 497153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 529921.

It is not an unprimeable number, because it can be changed into a prime (529927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37845 + ... + 37858.

It is an arithmetic number, because the mean of its divisors is an integer number (151408).

2⁵²⁹⁹²¹ is an apocalyptic number.

It is an amenable number.

529921 is a deficient number, since it is larger than the sum of its proper divisors (75711).

529921 is an equidigital number, since it uses as much as digits as its factorization.

529921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75710.

The product of its digits is 1620, while the sum is 28.

The square root of 529921 is about 727.9567294833. The cubic root of 529921 is about 80.9227022584.

The spelling of 529921 in words is "five hundred twenty-nine thousand, nine hundred twenty-one".