421533461 has 6 divisors (see below), whose sum is σ = 427559286. Its totient is φ = 415591400.

The previous prime is 421533403. The next prime is 421533467. The reversal of 421533461 is 164335124.

It can be written as a sum of positive squares in only one way, i.e., 421029361 + 504100 = 20519^2 + 710^2 .

It is not a de Polignac number, because 421533461 - 2¹⁸ = 421271317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421533467) 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 5 ways as a sum of consecutive naturals, for example, 36770 + ... + 46851.

It is an arithmetic number, because the mean of its divisors is an integer number (71259881).

Almost surely, 2^421533461 is an apocalyptic number.

It is an amenable number.

421533461 is a deficient number, since it is larger than the sum of its proper divisors (6025825).

421533461 is an frugal number, since it uses more digits than its factorization.

421533461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83763 (or 83692 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 421533461 is about 20531.2800623829. The cubic root of 421533461 is about 749.7975518764.

Adding to 421533461 its reverse (164335124), we get a palindrome (585868585).

The spelling of 421533461 in words is "four hundred twenty-one million, five hundred thirty-three thousand, four hundred sixty-one".