421841473 has 4 divisors (see below), whose sum is σ = 421912260. Its totient is φ = 421770688.

The previous prime is 421841449. The next prime is 421841479. The reversal of 421841473 is 374148124.

It is a happy number.

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 258180624 + 163660849 = 16068^2 + 12793^2 .

It is a cyclic number.

It is not a de Polignac number, because 421841473 - 2²¹ = 419744321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421841479) 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 in 3 ways as a sum of consecutive naturals, for example, 25540 + ... + 38677.

It is an arithmetic number, because the mean of its divisors is an integer number (105478065).

Almost surely, 2^421841473 is an apocalyptic number.

It is an amenable number.

421841473 is a deficient number, since it is larger than the sum of its proper divisors (70787).

421841473 is an equidigital number, since it uses as much as digits as its factorization.

421841473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70786.

The product of its digits is 21504, while the sum is 34.

The square root of 421841473 is about 20538.7797349307. The cubic root of 421841473 is about 749.9801316218.

Adding to 421841473 its reverse (374148124), we get a palindrome (795989597).

The spelling of 421841473 in words is "four hundred twenty-one million, eight hundred forty-one thousand, four hundred seventy-three".