421212433 has 4 divisors (see below), whose sum is σ = 421257780. Its totient is φ = 421167088.

The previous prime is 421212431. The next prime is 421212457. The reversal of 421212433 is 334212124.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 344176704 + 77035729 = 18552^2 + 8777^2 .

It is a cyclic number.

It is not a de Polignac number, because 421212433 - 2¹ = 421212431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421212431) 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, 3118 + ... + 29191.

It is an arithmetic number, because the mean of its divisors is an integer number (105314445).

Almost surely, 2^421212433 is an apocalyptic number.

It is an amenable number.

421212433 is a deficient number, since it is larger than the sum of its proper divisors (45347).

421212433 is a wasteful number, since it uses less digits than its factorization.

421212433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45346.

The product of its digits is 1152, while the sum is 22.

The square root of 421212433 is about 20523.4605512813. The cubic root of 421212433 is about 749.6071619773.

Adding to 421212433 its reverse (334212124), we get a palindrome (755424557).

The spelling of 421212433 in words is "four hundred twenty-one million, two hundred twelve thousand, four hundred thirty-three".