420421433 has 4 divisors (see below), whose sum is σ = 427547280. Its totient is φ = 413295588.

The previous prime is 420421427. The next prime is 420421447. The reversal of 420421433 is 334124024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420421433 - 2²⁴ = 403644217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420421399 and 420421408.

It is not an unprimeable number, because it can be changed into a prime (420421423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3562835 + ... + 3562952.

It is an arithmetic number, because the mean of its divisors is an integer number (106886820).

Almost surely, 2^420421433 is an apocalyptic number.

It is an amenable number.

420421433 is a deficient number, since it is larger than the sum of its proper divisors (7125847).

420421433 is an equidigital number, since it uses as much as digits as its factorization.

420421433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7125846.

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

The square root of 420421433 is about 20504.1808663502. The cubic root of 420421433 is about 749.1376357803.

Adding to 420421433 its reverse (334124024), we get a palindrome (754545457).

The spelling of 420421433 in words is "four hundred twenty million, four hundred twenty-one thousand, four hundred thirty-three".