527821 has 4 divisors (see below), whose sum is σ = 603232. Its totient is φ = 452412.

The previous prime is 527819. The next prime is 527843. The reversal of 527821 is 128725.

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 527821 - 2¹ = 527819 is a prime.

It is a d-powerful number, because it can be written as 5⁵ + 2¹⁸ + 8² + 7³ + 2¹⁸ + 1 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (527851) 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, 37695 + ... + 37708.

It is an arithmetic number, because the mean of its divisors is an integer number (150808).

2⁵²⁷⁸²¹ is an apocalyptic number.

It is an amenable number.

527821 is a deficient number, since it is larger than the sum of its proper divisors (75411).

527821 is an equidigital number, since it uses as much as digits as its factorization.

527821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75410.

The product of its digits is 1120, while the sum is 25.

The square root of 527821 is about 726.5129042213. The cubic root of 527821 is about 80.8156657695.

The spelling of 527821 in words is "five hundred twenty-seven thousand, eight hundred twenty-one".