343021421 has 8 divisors (see below), whose sum is σ = 361864320. Its totient is φ = 324257472.

The previous prime is 343021411. The next prime is 343021423. The reversal of 343021421 is 124120343.

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

It is a cyclic number.

It is not a de Polignac number, because 343021421 - 2¹⁴ = 343005037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 343021393 and 343021402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343021423) 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, 10700 + ... + 28293.

It is an arithmetic number, because the mean of its divisors is an integer number (45233040).

Almost surely, 2^343021421 is an apocalyptic number.

It is an amenable number.

343021421 is a deficient number, since it is larger than the sum of its proper divisors (18842899).

343021421 is a wasteful number, since it uses less digits than its factorization.

343021421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39475.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 343021421 is about 18520.8374810644. The cubic root of 343021421 is about 700.0145718055.

Adding to 343021421 its reverse (124120343), we get a palindrome (467141764).

The spelling of 343021421 in words is "three hundred forty-three million, twenty-one thousand, four hundred twenty-one".