421343029 has 4 divisors (see below), whose sum is σ = 424559520. Its totient is φ = 418126540.

The previous prime is 421343023. The next prime is 421343033. The reversal of 421343029 is 920343124.

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 421343029 - 2⁵ = 421342997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421342988 and 421343006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421343023) 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, 1608049 + ... + 1608310.

It is an arithmetic number, because the mean of its divisors is an integer number (106139880).

Almost surely, 2^421343029 is an apocalyptic number.

It is an amenable number.

421343029 is a deficient number, since it is larger than the sum of its proper divisors (3216491).

421343029 is a wasteful number, since it uses less digits than its factorization.

421343029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216490.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 421343029 is about 20526.6419318894. The cubic root of 421343029 is about 749.6846253296.

The spelling of 421343029 in words is "four hundred twenty-one million, three hundred forty-three thousand, twenty-nine".