421234433 has 2 divisors, whose sum is σ = 421234434. Its totient is φ = 421234432.

The previous prime is 421234423. The next prime is 421234439. The reversal of 421234433 is 334432124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415222129 + 6012304 = 20377^2 + 2452^2 .

It is a cyclic number.

It is not a de Polignac number, because 421234433 - 2¹⁰ = 421233409 is a prime.

It is not a weakly prime, because it can be changed into another prime (421234439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210617216 + 210617217.

It is an arithmetic number, because the mean of its divisors is an integer number (210617217).

Almost surely, 2^421234433 is an apocalyptic number.

It is an amenable number.

421234433 is a deficient number, since it is larger than the sum of its proper divisors (1).

421234433 is an equidigital number, since it uses as much as digits as its factorization.

421234433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 26.

The square root of 421234433 is about 20523.9965162733. The cubic root of 421234433 is about 749.6202124551.

Adding to 421234433 its reverse (334432124), we get a palindrome (755666557).

The spelling of 421234433 in words is "four hundred twenty-one million, two hundred thirty-four thousand, four hundred thirty-three".