421434243 has 24 divisors (see below), whose sum is σ = 635980800. Its totient is φ = 268602480.

The previous prime is 421434241. The next prime is 421434253. The reversal of 421434243 is 342434124.

It is a happy number.

It is not a de Polignac number, because 421434243 - 2¹ = 421434241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421434241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14058 + ... + 32256.

It is an arithmetic number, because the mean of its divisors is an integer number (26499200).

Almost surely, 2^421434243 is an apocalyptic number.

421434243 is a deficient number, since it is larger than the sum of its proper divisors (214546557).

421434243 is a wasteful number, since it uses less digits than its factorization.

421434243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18319 (or 18316 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 421434243 is about 20528.8636558383. The cubic root of 421434243 is about 749.7387196540.

Adding to 421434243 its reverse (342434124), we get a palindrome (763868367).

The spelling of 421434243 in words is "four hundred twenty-one million, four hundred thirty-four thousand, two hundred forty-three".