420845533 has 4 divisors (see below), whose sum is σ = 420915580. Its totient is φ = 420775488.

The previous prime is 420845531. The next prime is 420845539. The reversal of 420845533 is 335548024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15507844 + 405337689 = 3938^2 + 20133^2 .

It is a cyclic number.

It is not a de Polignac number, because 420845533 - 2¹ = 420845531 is a prime.

It is a super-2 number, since 2×420845533² = 354221925292108178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420845531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25068 + ... + 38341.

It is an arithmetic number, because the mean of its divisors is an integer number (105228895).

Almost surely, 2^420845533 is an apocalyptic number.

It is an amenable number.

420845533 is a deficient number, since it is larger than the sum of its proper divisors (70047).

420845533 is an equidigital number, since it uses as much as digits as its factorization.

420845533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70046.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 420845533 is about 20514.5200528796. The cubic root of 420845533 is about 749.3894485856.

The spelling of 420845533 in words is "four hundred twenty million, eight hundred forty-five thousand, five hundred thirty-three".