421023343 has 16 divisors (see below), whose sum is σ = 480936960. Its totient is φ = 365124096.

The previous prime is 421023341. The next prime is 421023371. The reversal of 421023343 is 343320124.

It is a happy number.

It is not a de Polignac number, because 421023343 - 2¹ = 421023341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421023341) 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, 155346 + ... + 158032.

It is an arithmetic number, because the mean of its divisors is an integer number (30058560).

Almost surely, 2^421023343 is an apocalyptic number.

421023343 is a deficient number, since it is larger than the sum of its proper divisors (59913617).

421023343 is a wasteful number, since it uses less digits than its factorization.

421023343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 421023343 is about 20518.8533549027. The cubic root of 421023343 is about 749.4949743789.

Adding to 421023343 its reverse (343320124), we get a palindrome (764343467).

The spelling of 421023343 in words is "four hundred twenty-one million, twenty-three thousand, three hundred forty-three".