421434433 has 16 divisors (see below), whose sum is σ = 486014976. Its totient is φ = 357964560.

The previous prime is 421434413. The next prime is 421434469. The reversal of 421434433 is 334434124.

It is not a de Polignac number, because 421434433 - 2⁹ = 421433921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421434413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511660 + ... + 512482.

It is an arithmetic number, because the mean of its divisors is an integer number (30375936).

Almost surely, 2^421434433 is an apocalyptic number.

It is an amenable number.

421434433 is a deficient number, since it is larger than the sum of its proper divisors (64580543).

421434433 is a wasteful number, since it uses less digits than its factorization.

421434433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404.

The product of its digits is 13824, while the sum is 28.

The square root of 421434433 is about 20528.8682834685. The cubic root of 421434433 is about 749.7388323251.

Adding to 421434433 its reverse (334434124), we get a palindrome (755868557).

The spelling of 421434433 in words is "four hundred twenty-one million, four hundred thirty-four thousand, four hundred thirty-three".