452821 has 2 divisors, whose sum is σ = 452822. Its totient is φ = 452820.

The previous prime is 452813. The next prime is 452831. The reversal of 452821 is 128254.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260100 + 192721 = 510^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 452821 - 2³ = 452813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 452792 and 452801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (452831) 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, 226410 + 226411.

It is an arithmetic number, because the mean of its divisors is an integer number (226411).

2⁴⁵²⁸²¹ is an apocalyptic number.

It is an amenable number.

452821 is a deficient number, since it is larger than the sum of its proper divisors (1).

452821 is an equidigital number, since it uses as much as digits as its factorization.

452821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 22.

The square root of 452821 is about 672.9197574748. The cubic root of 452821 is about 76.7907400764.

It can be divided in two parts, 4 and 52821, that added together give a palindrome (52825).

The spelling of 452821 in words is "four hundred fifty-two thousand, eight hundred twenty-one".