420853 has 2 divisors, whose sum is σ = 420854. Its totient is φ = 420852.

The previous prime is 420851. The next prime is 420857. The reversal of 420853 is 358024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400689 + 20164 = 633^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 420853 - 2¹ = 420851 is a prime.

Together with 420851, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210426 + 210427.

It is an arithmetic number, because the mean of its divisors is an integer number (210427).

2⁴²⁰⁸⁵³ is an apocalyptic number.

It is an amenable number.

420853 is a deficient number, since it is larger than the sum of its proper divisors (1).

420853 is an equidigital number, since it uses as much as digits as its factorization.

420853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 420853 is about 648.7318398229. The cubic root of 420853 is about 74.9393880661.

Adding to 420853 its reverse (358024), we get a palindrome (778877).

The spelling of 420853 in words is "four hundred twenty thousand, eight hundred fifty-three".