343020421 has 8 divisors (see below), whose sum is σ = 348576984. Its totient is φ = 337505280.

The previous prime is 343020371. The next prime is 343020437. The reversal of 343020421 is 124020343.

It can be written as a sum of positive squares in 4 ways, for example, as 175032900 + 167987521 = 13230^2 + 12961^2 .

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 343020421 - 2⁹ = 343019909 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 (343020481) 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, 6561 + ... + 27001.

It is an arithmetic number, because the mean of its divisors is an integer number (43572123).

Almost surely, 2^343020421 is an apocalyptic number.

It is an amenable number.

343020421 is a deficient number, since it is larger than the sum of its proper divisors (5556563).

343020421 is a wasteful number, since it uses less digits than its factorization.

343020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20711.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 343020421 is about 18520.8104844254. The cubic root of 343020421 is about 700.0138915611.

Adding to 343020421 its reverse (124020343), we get a palindrome (467040764).

The spelling of 343020421 in words is "three hundred forty-three million, twenty thousand, four hundred twenty-one".