421435433 has 4 divisors (see below), whose sum is σ = 431714388. Its totient is φ = 411156480.

The previous prime is 421435429. The next prime is 421435451. The reversal of 421435433 is 334534124.

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 74097664 + 347337769 = 8608^2 + 18637^2 .

It is a cyclic number.

It is not a de Polignac number, because 421435433 - 2² = 421435429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421435396 and 421435405.

It is not an unprimeable number, because it can be changed into a prime (421405433) 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 in 3 ways as a sum of consecutive naturals, for example, 5139416 + ... + 5139497.

It is an arithmetic number, because the mean of its divisors is an integer number (107928597).

Almost surely, 2^421435433 is an apocalyptic number.

It is an amenable number.

421435433 is a deficient number, since it is larger than the sum of its proper divisors (10278955).

421435433 is a wasteful number, since it uses less digits than its factorization.

421435433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10278954.

The product of its digits is 17280, while the sum is 29.

The square root of 421435433 is about 20528.8926393997. The cubic root of 421435433 is about 749.7394253301.

Adding to 421435433 its reverse (334534124), we get a palindrome (755969557).

The spelling of 421435433 in words is "four hundred twenty-one million, four hundred thirty-five thousand, four hundred thirty-three".