572821 has 2 divisors, whose sum is σ = 572822. Its totient is φ = 572820.

The previous prime is 572813. The next prime is 572827. The reversal of 572821 is 128275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476100 + 96721 = 690^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 572821 - 2³ = 572813 is a prime.

572821 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (572827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286410 + 286411.

It is an arithmetic number, because the mean of its divisors is an integer number (286411).

2⁵⁷²⁸²¹ is an apocalyptic number.

It is an amenable number.

572821 is a deficient number, since it is larger than the sum of its proper divisors (1).

572821 is an equidigital number, since it uses as much as digits as its factorization.

572821 is an odious number, because the sum of its binary digits is odd.

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

The square root of 572821 is about 756.8493905659. The cubic root of 572821 is about 83.0500013230.

The spelling of 572821 in words is "five hundred seventy-two thousand, eight hundred twenty-one".