320003421 has 8 divisors (see below), whose sum is σ = 440434944. Its totient is φ = 206453760.

The previous prime is 320003407. The next prime is 320003441. The reversal of 320003421 is 124300023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320003421 - 2⁶ = 320003357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320003421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320003441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720356 + ... + 1720541.

It is an arithmetic number, because the mean of its divisors is an integer number (55054368).

Almost surely, 2^320003421 is an apocalyptic number.

320003421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

320003421 is a deficient number, since it is larger than the sum of its proper divisors (120431523).

320003421 is a wasteful number, since it uses less digits than its factorization.

320003421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440931.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 320003421 is about 17888.6394395996. The cubic root of 320003421 is about 683.9928160902.

Adding to 320003421 its reverse (124300023), we get a palindrome (444303444).

The spelling of 320003421 in words is "three hundred twenty million, three thousand, four hundred twenty-one".