421204433 has 4 divisors (see below), whose sum is σ = 453604788. Its totient is φ = 388804080.

The previous prime is 421204417. The next prime is 421204457. The reversal of 421204433 is 334402124.

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 257057089 + 164147344 = 16033^2 + 12812^2 .

It is a cyclic number.

It is not a de Polignac number, because 421204433 - 2⁴ = 421204417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 421204399 and 421204408.

It is not an unprimeable number, because it can be changed into a prime (421204493) 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, 16200158 + ... + 16200183.

It is an arithmetic number, because the mean of its divisors is an integer number (113401197).

Almost surely, 2^421204433 is an apocalyptic number.

It is an amenable number.

421204433 is a deficient number, since it is larger than the sum of its proper divisors (32400355).

421204433 is a wasteful number, since it uses less digits than its factorization.

421204433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32400354.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 421204433 is about 20523.2656514503. The cubic root of 421204433 is about 749.6024162364.

Adding to 421204433 its reverse (334402124), we get a palindrome (755606557).

The spelling of 421204433 in words is "four hundred twenty-one million, two hundred four thousand, four hundred thirty-three".